Yep, plugs into the port on the rear of the head unit, vacated by the cradle.
Mine didn't have the cradle so the port was vacant.
Check out the image on this page;
http://f30.bimmerpost.com/forums/att...1&d=1390256302
http://f30.bimmerpost.com/forums/sho...d.php?t=939410
USB socket goes here;
http://f30.bimmerpost.com/forums/att...1&d=1390903432