Looks like I have the same ones. I mounted to the exhaust bracket. Made a hardware store bracket from the frame.
I should have pics detailing this. I'll check when I get home.
But yeah, good design. Simple, light, worked well.
Last trip was 6k miles in 7weeks. Kept the Giant Loop Coyote off the Akras.
When camping, used them to tie on firewood and of course beer