The brackets are welded to the cross bar. The adjustment is in the slop of the mounting holes. Remove the splash shield and reach up with a 1/4" ratchet with 10mm socket, loosen and adjust to your liking. Be carefull becuase the rearward edge of the top comes real close to the fender when opening and closing. The rubber stops on my car were too thick and kept one corner up on each of mine. I found thinner rubber bumpers at the hardware store and fixed that problem.
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