HOMCOM A90-196 Instructions D'assemblage page 10

24.
Align backrest support with hole in the seat
post.
26.
Place washer onto the screw.
28.
Tighten the nut with the included wrench.
25.
Insert screw through hole in backrest
support.
27.
Place nut on screw and finger tighten. If
difficult to tighten, nut may be
upside-down.
29.
Place washers onto screws for the seat
handles (see parts diagram).