I'm Confused?

We'll after reading all your replies, I think I did a stupid when I removed the batteries. The one wire I said that was running from pos to pos may have been running from pos to neg. I just looked at the one battery and assumed they were both installed the same direction when they were sitting side by side. I didn't pay attention to see if maybe the other battery sitting beside it was turned around. Duh. If so, then the one wire running from pos on one battery would be to the neg on the other battery. Because I was in a hurry, I did't look at both batteries the way I should have.
When I go out tomorrow, I'll run a cable on neg to neg and pos to pos. I'll connect those two white wires from the rv to the pos and the two black wires from the rv to the neg. hopefully that'll do it. I'll let you know. Thanks for helping me get my thought process to going.