Pictures are not the greatest and my buddy made a new one that he connects using pins. I connect mine using bolts and wing nuts with lock washers. My buddies new one only has one support in the front and two supports in the back. Each was made to attach to our front and back racks.
But maybe the pics will give you an idea. I would also suggest keeping it as low as possible to your head, so sit on the bike and see what height feels best.
I would make a lot of changes if I built a new one. Only need one support in front. Would have found a better way to connect mine.
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