Some holes were missing to assemble the product. I carefully measured the hole size and locations and drilled them out. (see attached photos). It is not possible to assemble with adding the missing holes.  As you can see the instructions show 3 holes in the center of part #2 and two holes on each side. These holes are missing. I used a 5/64 drill bit for the anchors and 3/16 drill bit for the screws. It went together perfectly.