Left hand side below the black fairing piece is a rubber boot, wiggle it up and you'll find a pair of bullet connectors, one male one female, thats the auxillary power feed that only live when the ignition is on, I used that for the tomtom and heated grips. I was able to connect to it without removing any panels whatsoever, just by plenty of wiggling and muttering!
Photo taken from this thread :
http://www.zxforums.com/forums/showthread.php?t=5000
I believe credit for the photo goes to 08CC14.