dual tank to single tank wiring

[Low87]

Continued work on cleaning up my frame last night and got to all the wiring that runs along the rear of the frame. Tail light wiring is no biggie, I understand it.
What has got me confused is the fuel tank wiring. I had dual tanks with in-tank fuel pumps. Those were yanked and the last fuel cell installed with minimal butchering. There are two connectors that seem to be for splitting up the pump and sending unit power wire for each tank. In all there are 6 wires, all go to a single connector that wasn't plugged into anything with my fuel cell.
It's near impossible to explain the setup. I tried taking pictures last night but didn't get anything to come out clear enough. Basically what I need is to know which of those wires is my sending unit power, and if I can get rid of everything else. If there's anyway to just scrap all of it and run a new wire, that would be fine too. Anyone familiar with the in-tank pump, dual tank wiring harness? I could probably figure it out had I seen how it was originally connected, but that's long gone.