Step 8: Connect Top side support bar (L) to Top
beam (D) by using Adjust bolt (LL), as Fig.1.
Fix the mortise lock of Seat (G) into the hole of
Back foot (C2), as Fig.2.
Step 9: Connect Top side support bar (L)
and Top connect bar (K) by using bolt (JJ)
and washer (GG), then cover plastic cap
(EE).
