repro switches are notoriously bad. Originals work well and are available. Check with Berts. . Repro headlight wiring and sockets are even worse. If you have repro wiring, cut the tips off the harness, cut the tips off the headlight bucket wires. Pull the headlight wires up into the bucket. Thread the harness wires through the springs where the bucket wires went into the bucket. You might have to strip off the cloth "insulation", but do not strip off the inner plastic insulation.. Connect the wires with wire nuts. Green is High beam, Red is low beam, Yellow (or white on some harnesses, is the parking light. Re-place the plastic spacer on the wire so it fits against the springs to lock the ferrule in place when you install it.