Okay, I was just wondering..my last setup I had the ground go from my D3100 batt to the frame and the ground from the amp going to the ground on the battery. Everything worked fine. I didn't see much voltage drop...but since I'm going for SQ, I want to make sure I do everything right. AS much as I want to eliminate drilling holes into my car...is this the best way to wire all of these:
Picture contains 2 back up batteries 1 starter battery, 2 amps and a processor.
Please correct me if I'm wrong or tell me some other ways I can wire this to eliminate putting more holes into the frame of my car.