Hey, So far I've never camped without shore power but I may later on. I do have a battery that was hooked up stock with 12 guage wire. I added an inline 15 amp blade fuse and a metal toggle switch so I can disconnect without opening box. The switch says 20 amp and the in line fuse came with 15 amp in the 12 gauge wire. Will the switch and fuse carry as much current as the 12 guage wire? I see here on the portal that 10 guage is recommended. If I went to 10 guage wouldn't I have to bypass all of the factory wiring from the tow vehicle battery all the way to converter? Would a 10g wire hook to back side of truck 7-pin connector?