How to: Replace or fix Cover in Shelf Rear (5J9 867 871 B)

Hi guys,
I have a problem with a piece of the trunk of my fabulous Fabia.

The boot compartment for the back is released from the holder. This cover is plastic and detaches from the roll bar. Now I do not know how to open the piece to paste the cover again. The springs, the roll and the part work correctly. I just peeled off the cover because I put too much weight on it.

Someone knows how I can open the part 5J9867871B to rewind the cover. I was looking if I had a pin or insurance but I do not see them. I made the attempt to try to remove the side plastic parts but I am afraid of damaging or breaking the pieces. I have also searched the internet but I can not find a manueal of that piece that tells me how to open or replace the cover.

Some of you know how I can solve this problem or where I can find information to the respects.

Thank you in advance for your valuable collaboration.

Edited 14 February, 20179 yr by JorDan_R