Have a question that I've never considered before. Looking at purchasing a slide in camper which will have a wiring harness to connect to the truck for 12v power. We have a 7 prong female connection in truck bed which would be used for this. Also, will be towing a boat which would use the rear bumper 7 prong female connector. Boat trailer brakes are surge, not electric. Will having 2 wiring harnesses connected at the same time overload the system? Any insight would be greatly appreciated. Thanks