There are two green wires that are on the inhibitor switch connector (large gray one that sits with the set of three on the RH fender well next to hicas solenoid) these just need to be routed to the reverse switch. An easy test would just be to unplug the connector and connect the two pins for these wires and see if the lights come on. Connecting both pins would simulate the switch making continuity.
"torque gets you off the line...& hp gets you over the line." - TTKeeper