On both of my K1300Ss I fitted a "normal" power socked to the small inner fairing pannel at the base of the mirror on the left side and "hard wired" it, with in line fuse, to the battery. It stayed live all the time, I could easily feel power to extra devices on the handlebars or in a tank bag. It was very useful for charging phones, MP3 players or anything else. Cost peanuts and I got a socket with a weather cover so it never gave any problems.