Here are the wiring instructions for Painless. IMO, they are the best in the industry and will help you answer your questions. I believe the color codes are close if not identical to the EZ harness. I know I'll sound like a complete geek, but wiring is one of the parts I look forward to doing! Good luck!
http://static.summitracing.com/global/images/instructions/prf-multi.pdf
http://static.summitracing.com/global/images/instructions/prf-multi.pdf
