I up graded to two 6 volt Trojans (T105). They are installed on the front trailer frame behind the propane tanks. They are in two separate cases and wired for maximum amp hours. I have one cable connecting them together (negative to positive) and the positive cable going about 5 feet and enters a junction box with the wire from the tongue jack and the main 7-pin I connect to the TV. The other cable is a little longer but just just connects to the frame next to where the positive cable goes into the junction box. I just noticed the cables are 6 gauge. From the conversation on this site, I'm beginning to think they are to small. Any thoughts?