Problems Putting in the selector shaft seal

I saw something like that.
I don't know for 100% sure but what it looked like on mine.

The tail shaft housing has that tab that hides the pin, except, the tab closes off the pin and compresses the gasket between the tail shaft housing and the transmission.

On some of the ones i saw. The tab hangs down and prevents the pin from sliding out.

Mine is completely closed off. Is this possible?
or was it an illusion cause by a bad angle.