OK! So I have some more news...
The lone red and black go to the LP sensor.
The 2 black wires that combine on the side PUSH 12v when I am plugged into shore. So the power box must be sending change to the battery. They push NOTHING when I unplug shore.
Then... If I start the RV (still unplugged from shore) and check the 2 black wires.. I get .5v but then it keeps going up slowly.. .51, .52, .53.. I waited until .81 and got bored of holding the meter. It took probably 45 seconds or so.
So... I can now hook up the wires with no threat of crossing them (thank you all again).
My guess now is that ONE black and ONE white are the CHARGE wires and the OTHER black and white power the converter from the battery when I am not plugged in. (Does that sound right?)
Or maybe, the one set of black/white both PUSH and PULL depending on the need, and the OTHER set go to the engine alternator.