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4 58 40 9 5 3 43 57 22 66 Hexagonal Holes 6464 9 6 66 3 21 19 54 66 66 4 8 7. Attach the Medium Pin (45) to the Seat Frame (11) with an M4 x 16mm Screw (58). Attach the Seat (14) to the Seat Frame (11) with two M6 x 16mm Screws (61), two M6 x 35mm Screws (56) and two M6 Washers (68). 8. Orient the Backrest Frames (12) so that the indicated holes are closer to the tops of the Frames. Apply some of the included grease to an M10 x 185mm Hex Bolt (63). Attach the Backrest Support (13) between the Ba