Thanks for the pic. Looks like that's in the left wall of the glove box....correct? I agree location isn't critical, I just wanted to know where the factory put the port so I could try there first.

There's on other aspect of the retrofit I'm not clear on, did you have to change the connector on the iDrive harness to mate to the late iDrive controller? I've bought the connector but I'm getting different stories on whether it's neded or not.