I am putting a 36 volt MG on the front replacing the 24 volt.. Currently B/C has 4 wires running to the front of the boat a red, white and two black. The 24 volts is made up at the plug do I need to run two more wires to the front or would it not be easier to connect the batteries in series and just use two of the 6ga that are going to the front of the boat.Irv