Need help with 85 pace arrow house batteries

I live in an 85 pace arrow by fleetwood. Nothing works. I have taken the two marine batteries out as they were all bad looking and nothing worked anywaym from what i was told it should all work with new batteries. I have two 12 volt marine batteries from my solar set up i want to hook up. The thing is, there are so many wires that i have no clue what is what. I hooked up a starter battery to two wires and the windshield wipers started working for a little while but then quit. Have not been able to figure anything out. I would like to get house power working (lights, water pump, etc). The RV doesnt need to drive, it is where it is.

Can anyone help me out or provide an easy to understand diagram on how to get it set up? I can post pics of what the wires look like if it will help.