Attached you will find a picture of the sunroof cable manual operation area. Surrounded by the yellow circle is the part that broke off. What is the function of this jagged knob? I accidentally broke it and need to know how to repair it.

The area surrounded by the red circle, is the area where i placed the socket (17mm) and attempted to close the roof manually. I was not able to move it in either direction. Also I can not move the sunroof with the switch.

I assume it is because of the knob I broke?

Attached Thumbnails

 

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