Costway SP37857 Manuel D'instructions page 6

Scooter assembly
A - Take out the plastic plug
With the tools in the accessory bag, remove the plastic stopper (12), so
that the handles (1) can be inserted into handle locking mechanism (13).
B - Unfolding the steering column
Open the quick release skewers (11), and then pull the folding trigger
(10) up towards the handlebar to unlock the folding mechanism (5). Then
lift up the steering column (9) until it reachers the veritical locking
position.Tighten the quick release skewers（11）firmly. When you unfold
the scooter, please make sure that you can hear a click when it's in right
place.
C - Positioning the handles
Take the two handles (1) out of their plastic cover, insert them into the
right and left parts of the stem (7). For each of the two handles, you
should hear a "click", indicating that the handles are engaged. Check that
the two spring buttons (6) are effectively out and visible. The scooter with
suspension, open the handle quick, release lever (2) and follow the
instructions below before tightening it firmly.
D - Adjusting the handlebar height
Open the steering column and rapid tightening lever (8), adjust the height
of the handlebars until you hear a "click", indicating engagement in one of
the two indexed positions, then firmly tighten the steering column rapid,
tightening lever (8).
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How to fold
E
G
Folding the scooter
E - Folding down the handlebars
Open the steering column and rapid tightening lever (8), press in the
steering column spring button (3), lower the handlebars, then tighten the
steering column, rapid tightening lever (8).
F - Packing away the handles
For each handle (1), press in the spring button (6), take the handle out
(1) from its place in the stem (7), and put it in its plastic cover.
G - Folding the steering column
Open the quick release skewers (11), and pull the folding trigger (10) up
towards the handlebar to unclock the folding mechanism (5). Then lower
the steering column (9) until reach the locked position, and then tighten
the quick release skewers (11).
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