73+ Caliper install

I am embarrassed to ask. I have searched both here and youtube.

I cannot get my head around how the calipers attach to the brackets.

Sorry for the silly question!

Did the swap on my 71 Duster with new LBJ UCA's, 73 Spindles/brackets and a new set of calipers from RockAuto. They are for sure the correct ones, it just does not make sense coming from a slide pin world of Chebbie.