There should be an extra (unused) orange w/ white stripe wire where the headlight harness plugs in... that's accessory power. You can catch the same wire going to the rear lighting harness near the battery too. Use that one.Ralston said:I am wireing a radar detector up on my 03 fatboy. I need the best positive wire near the battery to clip to. I could go to the battery itself but i would rather not . Please advise! Thanks!