I installed one of these, and while I installed the RAM ball mirror mount (on the front brake master cylinder mirror mount, covered by a black vinyl cap for UV protection when not in use), I used the provided arm with the power port thru-bolt on the RAM 8mm handle bar riser bolt mount.   http://www.ebay.ca/itm/Navigation-Bracket-With-USB-Charge-Port-For-Yamaha-MT-09-MT-07-MT-03-FZ-07-FJ-09-/182370932314?hash=item2a7627965a