Trying to understand how to hook this maintainer up to above car. Seemed fairly straightforward until I actually opened up and discovered the battery hidden away. Figured out how to get to it and the negative side has only the single line leading off while the positive side branches into several wires. Understand there may be more than one battery on this vehicle and some of the reading says that is where the multiple positive leads go so the single positive hook-up will take care of all needs but don't know for sure?!?!

Any thoughts/help appreciated!