Assembly Steps Step 3 3.1 Insert vertical panel's wooden dowels into top assembly holes, fasten it with one long bolt through the bottom of middle top assembly rail. Step 4 4.1 Insert the left side frame into the tube at the she's front edge, make sure the vertical panel's wooden dowels are fully inserted onto shelf. Then push the side frame gnd fasten the shelf with two short bolts. == Step 5 5.1 Fasten the right side frame with two long bolts and three hart bolts. 5.