Use Wrench (D), Screw (A) to secure the Back Frame (1) to the Seat Frame (2). Use Wrench (D), Secure (A), Bolt (B), and Nut (C) to secure the Side Frame (3,4) to the Back Frame (1), Seat Frame (2), and Support Bar (5).
Put the Seat Cushion (6) on top of the Seat Frame (2). And tide the cushion rope to the Back Frame (1) as per diagram.