I have a 24group start-up deep cycle and a 27group gel deep cycle batteries. It has an off - 1 - 2 -both switch on them. #1 is the 24group and #2 is the 27group. #1 looks like it has 4 accesory wires to it and the 27 group only has one accesory wire to it. When starting it I would put it to #1, but when I get it started then what.<br />Also do I put it to off when I am done using the boat? Thanks for the advice.