Passenger Trains > Query for Southern Passenger car experts

All;

VIA Rail Canada has a few ex-Southern RR stainless steel Built by Budd coaches.

I have noticed that inside the vestibules there are round openings that do not contain anything. These are on the side of the vestibule that would be considered towards the interior of the cars.

Would anyone know what these were for? Perhaps before rebuilding while in the employ of The Southern there was a reason.

I have not seen these "portholes" on any other Budd cars.

Hopefully this makes sense.

Thanks in advance.

Looking at the Budd prints, the only thing I see is a recess for first aid kits. It does not say the shape,
but it is on the inboard vestibule wall.

Thank you SR2. Appreciate you taking the time to research this for me!

Is it possible that these were receptacles for the latches on the upper and lower dutch doors? These latches protruded out maybe an inch and a half to 2 inches beyond the flat inside surface of these doors.