no not the drain tube. it is the cable that opens the glas. if you look at the rear set of runners. it has cables hooked to them. they follow the outside channel all the way front wards. and at the end the cable goes into a copper tube and runs to the motor then past and turns to go to the rear. copper tubes look to be as long as the track on the opposite side.

many thanks
loren

92 montero rs 3.0 locked rear