The back of the Jaguar X-Type is fixed by the pistons. To remove it, you have to completely detach the back sofa. The sofa cushion is fixed by two latches near the door. We need to take one corner of the pillow first and pull it up, and then do the same thing on the other side. You'll just get out of the seat cushion and remove the pillow from the salon.
The back is held by two screws at the torx, and they will have to be turned off. Once the cushion and back of the back sofa are removed, the rear shelf anchorages will be accessible.
