I have 8 -12 volt batteries. I believe I made the mistake of hooking them up wrong or not the best way. I have 4 sets of 2 batteries equaling 24 volts. I believe I should have done 2 sets of 4 batteries in parallel for best results. Is that correct. Can you point to a wiring diagram for that set up. I believe that it is positive to positive for the 4 then negative to negative for the same 4. Then Positive to negative from the 2 sets. I have a busbar to connect to. I don't feel very comfortable without a diagram. Please help.