Thanks for the pictures. They are very helpful.
It looks like the are very close to the top of the holes in the valence. A question I have, do they mount with the chamfered edge on the frame end of the bracket up?

Yes one of my brackets has been worked on. Half of the bracket on one side has been fabricated to (supposedly) match the other side.
Looks like we have some work to do on them to get them shaped properly.

Thank You