[gamz]

I had the same question, and Dracheous was nice enough to provide the following:

All it really is, you open the mech box, and re route the wire inside the mechbox itself. There are channels for the wiring, the only "difficult" part which really is, is making sure you get the wire that goes under the motor gear down properly so that it doesn't get frayed from the gear; and possibly short the motor.