'65 Barracuda Trunk Brace/Bracket: What is it?

Valiant and Barracuda have the same brackets (at least my 63 Valiant and 65 Barracuda do). Three: one for the base of the jack to slip into, another for the hold-down spring to clip to, and the almost hidden one at the top for the top of the jack to sit on. Should be a piece of felt glued to the top bracket (if I remember correctly, which these days sometimes I don't), but that part is long gone on both my early A's. Here's the Valiant jack:

20201105_055427.jpg

20201105_055438.jpg