Its a 2014 FLHTP... does the antenna mount outside the fairing?
The antenna base is magnetic so call your dealer and they should have a part # for the 14 up I would think. My 13 down part # will do you no good. But yes inside the fairing is the location.
With the magnetic base, I just stuck it to the radio accessory shelf. The signal is coming in and out, so I figured it needed to be mounted OUTSIDE the fairing.
Bracket part # for 14+.76000504. Has to be routed away as much as possible from the source unit including the box that goes from head unit plug that the antenna plugs into. Best advice I can give. Other than occasional loss due to trees and going under bridges I have had no issues for 2 seasons.