Man KF-OB Owner's Manual page 10

Assembly
NOTE: Hand tighten bolts and nylon nuts until machine is fully assembled.
STEP 5
Connect Back Pad (12) to Back Pad Support (9) using Screws (34).
Connect Lower Back Pad (44) to Back Pad Support (9) using Screws (34).
Connect Seat Pad (13) to Seat Support (10) using Bolts (33) and Washers
(38).
Insert L Pin (28) and screw in Knob (15) into front of unit - both (28) and
(15) are used to secure attachments.
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