[jerryhawthorne]

Kirk, your understanding in post one is spot on for that cap. Simple single cap in a can that is tied to the chassis. Positive to the center conductor, negative to the can. What most of us have a problem with is the screw in the side of the can to presumably tied the ground there. It is not necessary, required a lot of effort and will not provide a good ground. It was tied to the top of the can which has no great connection (compression fit perhaps) to the base of the can.
Soooo much easier to drill a small hole in the base and run the negative wire into that and tie it to the chassis. At least under one of the nuts holding the clamp of cap in place or a local chassis ground connection. As for the positive, drill a small hole next to that terminal and feed through to tighten around or solder to that terminal. If it is a solder type go for that. If it is nut type, wrap it around it. As Mike has indicated, soldering just doesn't work on the can inside terminals as they are typically aluminium and were spot welded to the wiring of the original caps.
For your two cap can, do the same thing, three small holes in the base to feed the wires in
two close to the riveted tabs and one close to the outside for the grounds. Sorry if we are unclear but tough working with such a talented cabinet person and well, new to the electronics. Wish you were about 2000 miles closer I could help you with the electrical and you could help me with finishing.
Best Jerry