I first used a cig plug, but found it would vibrate loose and also cause clearance problems because the male plugs are rarely set at a 90 degree angle.
this is the way I did it.
Use the powerlet as the plug on the busa and use powerlet plugs on GPS and heated clothing etc.
When needing an occasional cell phone charger or other charger that you cannot or do not want to install a powerlet male end on, make an adapter from powerlet to conventional cig plug.
If you use a tank bag make the adapter wire long unough to be placed inside the bag.
If all you are going to power is a cell phone this will be way too much trouble.
I would then go with a two prong trailer connector (same as the battery tender) fused at the battery and attach a cig plug to another two prong trailer connector. I also have this and it exits between the tank and the frame. It can be used for the batt tender, heated clothing or your cigarette plug adapter.