Screw the pins into the pre-drilled holes on the side panels. Before you attach the bottom piece and the rails to the side panel, you must first insert camlocks into them. You'll first fix the bottom panel to the side. Insert the pins into the camlock, making sure the panel's white edges are facing the same side and camlocks are facing down. Tighten the locks with your screwdriver to secure. Then repeat the same process for all of the rails. For the rails, ensure the camlocks are facing outside so you won't see them when you open up the cabinet door. Then prepare and attach the other side panel to finish off the cabinet.
Using the supplied nails from the cupboard kit, nail the back onto the cabinet. Make sure the white side is facing inside so you will only see white when you open the cupboard door.