[1stbmwx5]

I searched this forum, but couldn't find anything. I just bought a 2014 750Li and I absolutely love it. It will be a 2nd car, however I would like to mount an escort radar detector using a blend mount hardwired to my rearview mirror. I've done this on my pick-ups and a 2016 MB, however never on a BMW. Anyone here ever done this? If so, what wires do I tap in to? Any help is appreciated.
TIA