Yea... I know the white is negative... I am an idiot and wasn't thinking. I just replaced the power system and connected the black wires to positive.
See? I thought the wires connected to the side were to GROUND it... Didn't realize it was a circuit breaker! :) I now think the lone black cable is the charging wire. There was a lone black and white wire (not connected to one another) at the power box, so those have to be the charging wires.
But now I have an ODD number of wires.. 2 white negative and 3 black positive and a red wire I have ZERO idea about. There was no red wire at the box and I don't see the white "charging wire" in the battery box. Maybe somewhere it turns into the red wire?
You all have helped a LOT. I think I have most of it now. All I have left is just the red wire and where the white ground from the charging line went to.
If the alternator in the engine also charges the house battery (and it should right?)... I should also expect wires from the alternator coming to the house battery. Maybe THAT is the RED? But then I am missing TWO grounds! lol
I can find a LOT of stuff about how to connect the batteries, but nothing on how the internal wiring all works... Like from the house to the alternator and so on.