Leckey Mygo Bedienungsanleitung Seite 36

9.9 Backrest cushion
If you have lateral supports fitted to your seat,
adjust them to their maximum width before
attaching the backrest cushion.
Slide the cushion down over the flexible sacral
cushion and secure in place using the four
snap fasteners in the backrest moulding.
Align the lower fasteners first and snap in
place, then secure the top fasteners.