If its the same as moto guzzi you can use it as the live switched feed for the sat nav. There is a BMW male connector available that should fit. About £16 if memory serves me correctly.
Cheers. Ron
All sorted, thank you, I tried and tried to get the sat nav to work from this feed to no avail, may have a break in the wire somewhere or not be fully wired up. So just piggy backed off the pilot light...cheers all