W123 without central locking – how to open doors from the inside?

Hello, a probably simple question: How do I open the rear doors on a W123 limousine without central locking when they are locked? Can you pull the small locking pin up again (ala Golf II) or can you just pull it through the door handle inside? The latter would be extremely impractical, but it looks to me as if the locking pin has completely disappeared when the door is locked, so you can’t pull it out manually. The second series (built in 1980). I think the fuse pins were longer in the first series and also looked out in the locked state. Thank you and greetings