Hello all. Our 2004 Rapido 786f habitation door has a window that slides down. It's never opened but I can see that the part attached to the door must be missing. Can anyone tell/show me what the missing part looks like, please, so I can try to replace it. As you can see there is part of it still attached to the door and you can just see 2 screws holding it in place. I can't see any sign something has snapped off this bit. Help very much appreciated.