I have a omnismart 725 that i need to replace the batteries in I have bought the batteries but for got to keep track of the way the wires were put on. ie from unit comes a + and - but since there is 2 bateries they had a jumper at the other end. So I need to know if I put the jumper from = to - then at the main connection do I put the = from case to + or -? need wiring diagram.!