Where are the Seatbelt Mounting Points in 68 BArracuda Fast Back

"they could have been removed years ago."

I cut a small hole in the headliner where the upper shoulder belt belt bolt would go, my early '68 has the bracket with the bolt hole, but no nut - threads.
so with out shoulder belts installed, the clip at the sun visor would also not be installed.

I do want to have shoulder belts, I'll follow the suggested fixes listed on this thread a get a resolution