Eco-De ECO-822 Manuel D'instructions page 14

Secure front stabilizer (33) and rear stabilizer (28) to
main frame (31) with bolt (29), arc washer (30), nut (10)
a. Attach swing rod (14L/R) into the axle of handlebar post
(41), then tighten it with bolt (6), spring washer (48) and
washer (5);
b. Secure connecting rod (23L/R) to main frame (31) with nut
(25) and washer (24), then attach end cap (26);
a. Connect trunk wire (35) with sensor wire (34);
b. Connect tension control (43) with tension wire (42);
c. Secure handlebar post (41) to main frame (31) with screw
(15) and arc washer(30).
a. Secure pedal (L/R) to connecting rod (23L/R) with bolt
(20), washer (17) and nut (16).