Step 1 1.1 Lay the right side frame (D) onto a soft surface. Insert the right side frame's {D} tube into one end of the back gallery (E), see the screwing hole position at the sketch below. 1.2 Fasten with 1 bolt, lock washer and flat washer Put the Top and Bottom (A} panels on, make sure the front edge are flushed with the side metal frame's (D} front adj. 1.4 Fasten with 6 screws (F), 1 at the bottom of each panel and 2 at the back of each panel Flush here Step 2 2.