Twingo rear seat latch

Hi all. I just got myself an old style twingo and surprisingly the quirky little car comes with some unexpected features. Like. Reclining rear seats. Unfortunately one of them is broken. Well at least the latch is. Here is what I can tell.



The working latch when pulled lifts a piece of metal what I guess releases the latch. The other broken side does nothing when the handle is pulled.



Does anyone know much about the part and how I could get into it and fix it. Not sure if it's a common problem. For reference it's the drivers side latch (LHD CAR)



Thanks