You can buy one from Triumph for about 32 bucks or buy one from Cycle Gadgets for $15.95 A member made mention that most tractor supply places sell BMW type connectors as well. You can see where it mounts by looking at this picture. Look right behind the cam cover. See the black flap covering it on the rear motor mount?



Here is a better picture of it.

From the left side, discern the purple wire. The plug that has that purple wire is for the plug you ask about. (It's prewired in the harness) The plug is hot all the time too.


Blowing gravel off rural roads