Help with 71 Duster rear wiring harness

What do you HAVE? That is, was it hacked off and the rear sockets left in the lamps, etc? if so you could modify another year. The rear harness is not all that complicated

A wire for the rear trunk light if used
A wire for the fuel sender
A wire for both tailights
A wire for EACH stop and turn lamp
A wire for the reverse lamps.
Probably grounding wires from part of the harness for the tail lamp sockets