OKAI EA10A Instruction Manual page 16

4.Steering tube installation procedures.
Stand up the steering tube and pull the
folding handle upward to secure the
folding device.
5.Seat tube installation procedures.
Stand up the seat tube to buckle the
folder (refer to step 4).
folding
handle
14
retaining
ring
Clamp the retaining ring into the slot
of the folding handle, to serve as the
second safety fixed folding device.
Insert the seat cushion into the seat
tube retaining groove, and align the
body with a wrench to tighten the
seat screws.
slot of the
folding
handle