Thanks everyone. The wires are colored (red and black) so that helps. But there are more reds than I have Pos (+) terminals. From right to left, looks like the House battery(s) connections are straight forward, its when I get closer to the Engine battery where the extras are. They all are factory cables, so there may be some doubling up somewhere. I tried the ol' "where does it reach" method, but they could connect to the House or Engine battery(s) posts. It does have the Aux start button so one of those may be the extra wire. I will take pictures and post them next week. Thanks again!