Lever Nuts are great for Wiring our team used the at an off season event that we built a new robot for last year and they held together beautifully.
http://www.andymark.com/product-p/am-2576.htm
As for connecting into the PDP, VRM and PCM stripping the wire and sticking it in there is great but ferrule connectors are a great alternative to make wiring look crisp and clean.
Any questions feel free to ask.