Solved
I get this from a store because I have to replace my wheel cable. I am sure that there should be a metallic piece, that sourrounds the plastic pin connector. Can someone tell me the name of the piece? It makes the distance right and also the ring moveable. So that I can push it over the wheel part. Without this part the connector is not fixed, and I risk to damage the pins. Thanks for the help
It should replace this one: