I have an error code showing that the left rear wheel sensor is either open or short circuit on my E60.

I've tried a new sensor, but it made no difference, so the problem is in the wiring between wheel and control unit.

I need to do a simple continuity test, but I'm not sure where to locate the other end of the wire??? Can anyone tell me where the wheel sensor wire terminates so that I can put a test meter on it and prove it out?

I have a TIS manual, but it is sooooooo unfriendly to use and I can't find the relevent information.

Help please, anyone?

(a photo of the controller location would be great)