These look like the pieces that go across the window trim pieces where they meet and cover the space where they join together
There is another one like this that covers the screw that holds the side view mirror in place.
The picture of the brackets that go under the dash...The 2 on the right with the oval holes are the ones that go on each side of the glove box and those slots are where the glove box brackets go through these brackets.
I believe you will be able to figure where the other brackets go by trying to put them in the places where a bracket goes. Each bracket is different so only one will fit properly as you try each one..
If you need more help with this, I can try to take some pictures because I currently have my glove box removed as well as the other under dash panels.
Jack Bowser
C56B2198
Past Ownership 1991, 3206, and 1763
2006 Ford GT
2006 Cadillac XLR-V
427 Cobra
2012 Mercedes SLS AMG Roadster
1924 Dodge Brothers Rat Rod
Lots of Bowser gas Pumps