I don't have one on my B12, but I do have one on my C14. If I were to put it on my B12, I'd probably use a RAM mount on the handlebar. For 12v power, I wired a a terminal block straight off the battery. This doesn't give switched power, so I have to be sure I don't leave anything on when I walk away from the bike. Since I wouldn't leave my GPS unattended, and my other item is heated gear, it's not an issue for me.