I fitted mine to the power supply where the oem connector is on the bike its best to lift the tank to get to it then you can either use a correct plug or snip the ends of and get your power from there and you know its fused as well ,if you take a power supply from the headlight area and something blows you don't know what fuse could go and leave you stranded just 2p worths .don't use the aux power supply on the dash as I think it will overload it if used with grips and gps etc
jason