There should be one red positive cable and one black negative (ground) cable coming from the RV, going to the batteries. The red cable connects to the positive post of one of the batteries, the black connects to the negative terminal on the other battery. If you have 2 batteries for the coach they could be either be two 6 volts wired in series or two 12 volts wired in parallel.
'98 Gulf Stream Sunsport 325, 7.5L Banks Power Pack, Koni FSD's, Air Bags, ReadyBrute Elite,
2000 Honda Accord