I mount it to the top center edge of the fairing closest to me. Then I drill a big 1/2” hole so the cable (the connector is big) can be ran through the fairing to keep the cabling clean. Velcro also works but I’m not a fan of things not being bolted. The two bolt holes of the pickup are 1/8”, mock it up and sharpie your pattern on. Pretty easy
Kirby , if you are talking about one for a Mycron or such , make it so it can be turned . Some tracks use it on the inside of the track , but most use it outside . If your talking about a track provided transponder that goes in the pouch , most of them ask that you mount it to the bottom of the steering shaft .