Okay, well now you've got me totally confused. Trackig, you said there are TWO sets of batteries - and several cables. We have only 2 batteries, in the front generator compartment - the negative side on each has 2 cables running from them. That's it. There's no other battery that we have found on the RV.
I know that to you it sounds simple...but to a couple who know nothing about electricity or batteries - other than how to jump start car batteries - what you just outlined sounds daunting. Ours is an Open Range 3x, 42'6" long. With a battery disconnect lever. Anyone know if there are some other batteries somewhere we don't know about??