65 Barracuda inner door sill plates riveted or screwed?

Hey guys,

I have a question concerning the inner door sill plates of a '65 Barracuda. My fish had only one inner door sill plate when I bought it. Now I could get another pair and this brings me to my question.

The one plate I have is riveted, but a friend of mine has a '66 Barracuda with a screwed inner door sill plate - see the pics below.

My '65 fish:
View attachment 1715012494

View attachment 1715012495

The '66 fish:
View attachment 1715012496

View attachment 1715012497


So how where they originally mounted in '65?


Thanks in advance!
My 65 Cuda had them attached via screws. No collar like your photos either. Hope this helps !