[JRTJH]

Keystone uses 6 GA on the Springdale. When I added the second battery, I moved their smaller cable to the connections between the two batteries and bought 4 GA cables to connect to the trailer. I'm not really sure if it makes a lot of difference since there's still 6 GA wire going from the front of the trailer to the converter/fuse block that is in the back of the trailer, about 25' away from the batteries. But having the heavier cable connected to the cutoff switch makes me feel better about it, but there's no real increased performance from the 4 GA cable since it's limited by the smaller 6GA cable in the rest of the wiring.