Mounting Thule/Yakima Tracks on Bed Rails
So I want to mount my bike rack above my retractable Tonneau cover, and have a set of tracks to mount. I'm trying to figure out the best way to mount these?
Screwing them into just the plastic covers?
Screwing them to the sheet metal of the truck?
Bolting them to the sheet metal of the truck, but I'm not sure how to get a nut up there, is it hollow?
I've seen a few picture of people mounting them directly to the roll-up tonneau cover, but the GM one from Rock-n-Roll does not seem to be wide enough?
Any thoughts would be greatly appreciated.