Used Canopy, missing racks

Just bought a used leer cap, I believe it’s the 100r model, and there are some holes with bolts through them, side mounted, where racks once were located. After researching till the end of time, the closest thing I could find was the Thule ‘artificial raingutter’ mounts but they are 5 1/8” from centre of bolt hole to hole, and the current holes in this cap are 4 3/4” between.
Wondering if anyone has any knowledge as to what might have been mounted there, I’m assuming it’s something older that’s no longer in production as the cap was off a 2011.

many thanks