65 Barracuda trunk piece question

If I were a gamblin' man, I would bet those went down the sides of the trunk so your luggage wouldnt bounce around in the trunk and dent your fenders. see the angles end, That must go over the wheel well, bt I cant explain why the other ends are notched, they should almost be rounded to match the contour where the light sockets are. If you stick them in there, Im sure you can guess how they go in there. I have these huge voids in my trunk where the jack goes (driver side) and where my battery sits (right side) where all kinds of thinks can roll back into and disappear.