I have a 2017 EZGO TXT Elite, and I got an upgrade kit with turn signals, horn, and brake light controls. I'm having a heck of a time trying to figure out just where to mount the horn. The instructional videos I've watched just say to mount to a flat metal surface with self tapping screws. The only flat metal surface I can see on this cart is the frame, which is pretty thick steel. Has anyone with a 2014+ TXT found a good location for mounting the horn?