Step 1 1.1 Insert right side frame's (E} metal tube onto back frame (F), fasten with 2 short bolts, lock washers and flat washers. 1.2 Place the top (C) side up as per following sketch, insert the top metal tube onto right side frame, fasten with 1 short bolt, lock washer and fiat washer. Tighten. Step 2 Place the back panel (B) with wire cover facing up onto desk top, fasten with 3 long bolts, lock washers and flat washers. Step 3 Insert the left side frame onto tubes of top and back frame.