If it's still off the bike...
The rear fender's forwardmost wire harness pinch clamp on my 05 Speedmaster faces downward. This questionable design feature allowed the wire harness to fall down on the tire while riding through Knoxville one night. A wire tie of a color matching your fender could be wrapped around the left side fender tang near this clamp if you so desire. The wire tie is barely noticeable once the fender is re-installed. A dab of silicone caulk into the clamp area would probably work too. When my wires disappeared onto the TN ether at around 10 pm that night, some butt connectors and a wire tie had to suffice.
