Picked up a tour pack for the Heritage that came with a mount. The mount does not work on my bike. Hoping maybe someone can steer me in the right direction as to what it does fit. It is a quick attatch and appears to be a Harley piece, but not positive. It is 11” wide at the mounting points, and 7 1/2” from front mount to the rear mount. Any help would be appreciated.

Well it either fits the Pre-2008 or the post-2008, since, the rear fender after 2008 got wider....but since I am not with my '05Rk or my '18 SGS I can't go out and measure the fender ( docking ).....