Quick and simple. I have a , off,batt 1, both, batt 2 switch. If I hook the + engine cable to feed then put batt 1 on terminal 1, batt 2 on ter. 2 Can I run a seperate wire from batt terminal 2, to fuse block, for house load,[going to fuse block for electronics]? Will that [batt 2] be hot...