Hi Alex,   Attached you will find a photo. I also found a factory parts book photo but it was missing some of the pieces so a photo of the actual components will be easier to understand.   There are 2 pieces on the left side of the seat and 2 pieces on the right. On each side one piece moves with the seat bottom and the other piece stays affixed to the power unit or lower track. As the seat tilts up and down one piece stays stationary and the other moves with the seat, like the blades