Thank you for this information Whales. Yes, I take your point about the possibility of shorting. Given the amount of work involved already, I'd like to test the system as is to see if it works as planned, and make the male-to-female plug change for the input power supply down the road. When you say that it's unusual to use RCA connections at this current level, do you mean at such a relatively low current level? Other than the potential shorting problem, which I'll be careful to avoid, do you see any other major issues with supplying power from a 12V battery to the controller box RCA jack via the plug connector?