The good news is that the green wires end in crimp females that have to plug into two hefty matching lugs somewhere in the system. As they’re big enough to be fairly obvious, but aren’t visible in any of the photos so far, I guess they’re tucked away behind something. Not in plain sight. Is it possible the lugs are in the wiring loom, not on a board? Example connecting points 24 on Gerald’s circuit might be done that way.
Do a deep search for a pair of unoccupied lugs. With luck doing the search may trigger a memory, or when the lugs are found, they’ll be marked G and N1!
Dave