This is a portion of my CNC motion control board assembly documentation.

CNC Controller Motion Board Capacitors and Bridge Installation (Rev. D)

The filter capacitors and bridge are installed as follows:

The rubber feet are installe first. (Note, I accidentally deleted the first picture of the rubber feet installation, so you see the two holes drilled in the picture.)
I use three Jameco 157737 10,000µF capacitors to filter the 24VDC output from the transformer. It is actually easier to attach three capacitors to the box than just one or two as I show in the steps below. I use the two nylon straps to help me out.
The three capacitors are grouped into a triangle by using either one long nylon tie strap, or two shorter ones arranged in a loop. My long nylong tie straps were not long enough, so I used two shorter ones.
The nylon straps are tightened and the ends that stick out are snipped off.
The capacitors are placed into the box and a hole is dimpled using an awl for the drill.
For me, it was easier to drill o n the bottom of the box. Since it is really easy to see where the dimple is on the bottom, I just redimple the bottom and drill. (Note, this picture is a retake, since I accidently deleted the first one picture.) By the way, I used a drill sized for a #6-32 hole.
The capacitors are attached using a 2-inch #6-32 round head screw, a #6 washer, a #6 lock washer, 1/4 inch washer, and a #6 hex nut.
The 2-inch screw is placed through the hole, the capacitors are center over the screw, followed by the 1/4 inch washer, followed by the #6 washer, followed by the lock washer, and finally the #6 hex nut. The #6 washer is too small to hold the capaitors by itself, but in conjunction with the 1/4 inch washer the capacitors are held in place without any problems. The lock washer keeps everything from loosening up over time. The capacitors are not going anywhere.
The bridge is Jameco 179477 and it is placed next to the transformer and a hole is dimpled. (Note: the original picture was accidentally deleted; this is a retake.)
The hole is drilled from the bottom. Again, the dimple location is easily visble through the thin aluminim and I redimpled the hole from the bottom. The hole is size for a #10 screw.
The bridge is attached using a 5/8" #10-32 round head screw, a #10 lock washer, and #10-32 hex nut.
The #10-32 screw is placed through box hole from the bottom. The bridge is placed over the screw from inside the box. The bridge is tighned down using a lock washer and a #10-32 hex nut. That is it for the bridge installation.

	The rubber feet are installe first. (Note, I accidentally deleted the first picture of the rubber feet installation, so you see the two holes drilled in the picture.)
	I use three Jameco 157737 10,000µF capacitors to filter the 24VDC output from the transformer. It is actually easier to attach three capacitors to the box than just one or two as I show in the steps below. I use the two nylon straps to help me out.
	The three capacitors are grouped into a triangle by using either one long nylon tie strap, or two shorter ones arranged in a loop. My long nylong tie straps were not long enough, so I used two shorter ones.
	The nylon straps are tightened and the ends that stick out are snipped off.
	The capacitors are placed into the box and a hole is dimpled using an awl for the drill.
	For me, it was easier to drill o n the bottom of the box. Since it is really easy to see where the dimple is on the bottom, I just redimple the bottom and drill. (Note, this picture is a retake, since I accidently deleted the first one picture.) By the way, I used a drill sized for a #6-32 hole.
	The capacitors are attached using a 2-inch #6-32 round head screw, a #6 washer, a #6 lock washer, 1/4 inch washer, and a #6 hex nut.
	The 2-inch screw is placed through the hole, the capacitors are center over the screw, followed by the 1/4 inch washer, followed by the #6 washer, followed by the lock washer, and finally the #6 hex nut. The #6 washer is too small to hold the capaitors by itself, but in conjunction with the 1/4 inch washer the capacitors are held in place without any problems. The lock washer keeps everything from loosening up over time. The capacitors are not going anywhere.
	The bridge is Jameco 179477 and it is placed next to the transformer and a hole is dimpled. (Note: the original picture was accidentally deleted; this is a retake.)
	The hole is drilled from the bottom. Again, the dimple location is easily visble through the thin aluminim and I redimpled the hole from the bottom. The hole is size for a #10 screw.
	The bridge is attached using a 5/8" #10-32 round head screw, a #10 lock washer, and #10-32 hex nut.
	The #10-32 screw is placed through box hole from the bottom. The bridge is placed over the screw from inside the box. The bridge is tighned down using a lock washer and a #10-32 hex nut. That is it for the bridge installation.