Zipped tied mine on top of the crash bar where the lowers have that little extension of the lower that extends toward the middle of the bike (at the top of the crash bar, wraps around the crash bar), only a couple of inches of wire are showing. Some guys drill their crash bars and run the wires inside.
I was just asking as I was thinking of drilling the crash bar.
No no no. . . Don't drill your crash bar man! As Y2K, Moto Mike and BP said the wires are hardly noticeable under the crash bar with some wire loom. Like BP stated looks about as professional as it gets.