No wires coming out of drivers side mirror. What needs replaced? on 1990 Mercedes-Benz 300E

Just bought a 1988 Mercedes 300 E for my 16 year old. The passenger side mirror moves with the control in between the seats but the drivers side appears to have no wires coming from it? Are they supposed to move from the same control? How would I go about fixing this or what is the part called?

Asked by for the 1990 Mercedes-Benz 300E