1965 Hardtop Sedan de Ville inner fender wheelhouse hole covers

[DirkB]

My 1965 Hardtop Sedan de Ville has holes in the inner front fenders wheelhouse (see pictures).At a recent Cadillac Meet in Austria I took pictures of other 65s and how the holes are closed. There seem to be metal plates with wing nuts, metal plates with hex screws or plastic caps.
Does anyone know what was original for the 1965 Hardtop Sedan de Ville?

And what are these holes for?
Thanks
Dirk

[billyoung]

Almost 100% sure the hex nut screws.

[Chuck Swanson]

Pointed hex head bolts. I believe 5/16 head, around 3/4 inch long.  Remove to access the fender bolts for any fender alignment issues.  Tabs in your pic have been added.  Chuck