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STEP 5
A.) Attach Seat Support (#5) to Seat Post (#4). Secure it with two M8 Carriage Bolts
(#11) and two Flat Washer (#16) and two M8 Nylon Nuts (#22).
B.) Attach the Backrest Handle (#17) to the Seat Support. Secure it with two M8 Carriage
Bolts (#11), two Flat Washers (#16), and two Domed Nuts (#23).
C.) Attach Backrest Board (#15) to Backrest Support (#6). Secure it with four M8 Allen
Bolts (#12) and four Spring Washers (#21).
D.) Insert the Backrest Board Lock Pin (#28) to lock the Backrest Board when in use.