Guys, I have two battery switches and 4 batteries fitted. 2 starting and 2 house. Can anyone please tell me how the switching is connected? It all looks factory fitted. I'm not even sure if the batteries are fitted correctly. The two house batteries are in the forward two battery boxes and the starting batteries are in the back two boxes connected in parallel. That part makes no sense. I think they maybe fitted in all the wrong locations? Please help.