Leckey KIT User Instructions page 61

7.3 Fixed Backrest
spine
If the fixed backrest spine option has been
ordered, simply rotate the backrest into the
vertical position and insert pin (A) through the
base of the spine.
A
7.4 Seat Base
Cushion
Fasten the two poppers (A) at the back of the
seatbase. Press the cushion down onto the
Velcro which is on the leg support ramps.
Loop the elastic over the hooks (B) on the
side of the seatbase.
A
B