Golf III windows

Good afternoon,

I have a problem with the pilot's windows in a golf III (3 doors).

The window went up and down but has stopped working. When you give the button it is heard that the engine rotates a bit but the glass does not move.

I have opened the door and I have seen that the cable guide that goes from the front superior to the lower rear has the yellow plastic piece of the broken end. If you throw with the hand of the glass, but without getting up.

I have the French manual that I downloaded here, but I am not sure I have understood. It speaks of a white piece (clip pour cables) that when you go up the window passes behind a hole in the sheet. The piece is a shooter that fits into the plate hole, but I don't know what it is for.

I understand that to disassemble everything, the glass tweezers must be released, and then the 4 screws that hold the ends of the guides and the engine, and that everything will go below, but I do not dare to do it without knowing what is the blissful white piece ...

Can someone give me a hand?

Thanks in advance.