I used a BMW outlet with the spring loaded trap door. I used a spade bit to drill a hole through the left plastic radiator shroud (mark it with it on and take it off for drilling - duh). It fits and looks perfect. I have a 3.9 Clarke and it came out pretty nifty. It's in the hollow of the swell so even though it sticks out when somethings plugged into it I think it would be safe in most crashes. Plus, I mainly use it to charge with and run electric jacket while riding on the streets. When I'm in the dirt, I don't neet to have a heated liner on anyway so having it there works for me. If I needed something fulltime in the dirt, I'd probably add an SAE/trailer type connector and have the end sticking out betwen the seat and tank or to the bars. I went straight to the battery and used a fuse.