Hello, new here. We just bought a 2011 express, end of year sale cargo van. I need to put another battery in the back to run some 12 volt stuff and a inverter for a small frig. Need to know the best way to put in a battery isolator in the van. Does the new chevy van have a power distribution block on it anywhere. Any help, tips, or tricks on the wiring would be very useful as this is our first chevy. Our first van also. Thanks for any and all help.