Prepare 16 bolts assembly by inserting lock washer (#D), then flat washer (#E) onto bolts (#H,I). Align back/front rail (#5,6) to the end of the left/right arm (#1,2), then align bracket (#A) to the holes of the rails (#5,6) and arms (#1,2). Secure holes on the rails (#5,6) with bolts (#H) and secure holes on the arms (#1,2) with bolts (#I). Prepare 4 bolts assembly by inserting washer (#F) onto bolts (#J). Align support rail (#8) to the holes of the arms (#1,2). Secure with bolts (#J).
