I have a thetford C2 toilet and I need to wire it so that it will work?

I have a thetford C2 toilet and I need to wire it so that it will work. The owner before me made a mess out of the wiring and I can't make heads or tails out of it. I need a wiring diagram, from where the power comes in, to where it hooks on the unit, flasher, etc.I have already purchased the parts that I think I need, I just need to find out how to hook it up. I have looked at all the PDF that thetford has to offer and none of them show much. THANK YOU.