Left bar with a Ram powered mount, i have a nippy Norman ( T T ) instrument cowl with extra power outlet. This is how i power the unit, i took the audio lead for the unit and power lead to the socket down the side of the tank. The power is via the battery so the socket is always on, the Auto Comm is under the seat. GPS warehouse sell the powered mount. hope this helps.
OH! if you use Auto comm for audio, you will need a filtre from them to stop the buzz.
Lyn.