Impex WM-MXS Owner's Manual page 8

STEP 4 (SEE DIAGRAM 4)
A.) Attach four Bushings (#54) to the Seat Support Frame (#6).
B.) Attach four Bushings (#54) to the Backrest Supports (#7). Attach one Backrest
Support (#7) to the Seat Support Frame (#6). Align the holes. Please note the
Backrest Support (#7) should be on the inside of the Seat Support Frame (#6).
Secure them with one M10 x 2 3/8" Allen Bolt (#42) and M10 Aircraft Nut (#50).
Repeat the same procedure to install the other side.
7
DIAGRAM 4