2014 Cherokee 23BD, Battery Disconnect

[G.O.D.]

I have a Grey Wolf 23BD. Came with 2 12v Interstate Batteries. 1 is on the Tongue and a Year old the Other is a Brand New Power Volt, that is an Extra. I am going to mount the Extra Battery on the Tongue also and run a Dual 12 Volt system. I would like to Install a Disconnect but not sure where, because it looks like you use the Positive Cables for the Disconnect. Can you use the Ground Instead?.

[babock]

You can put the disconnect on either and either works equally as well but the standard install is on the positive cable. Mine is on the positive and on every trailer, camper, motorhome and boat that I have ever owned.