BMW Repair: 1989 535i blower resistor location, blower motor resistor, gauge wires

Question
Hello, I would like to know where the blower motor resistor is located in my 89 535i. It is the blue 4 wire one. Thanks so much for your time.

Answer
Steve, should be on the drivers or passengers side of the heater box. Should be a four wire connector with large gauge wires going to it. Pull it out, should have some large metal heat sinks. I don't have much experience with E34's let me know which side it is on.
-Evan