HOMCOM A90-196 Instructions D'assemblage page 11

30.
Align backrest support with hole in the seat
post.Insert screw through hole in backrest
support.
32.
Tighten down screws with included large hex
key/screwdriver tool.
34.
Tighten down screws with included large hex
key/screwdriver tool.
31.
Place screws into holes and finger tighten.
33.
Align backrest against backrest support.
Insert screws and finger tighten (see parts
diagram).