Put the cabinet on a workbench. The cabinet should be in the upright position.
Slide the cabinet side against the cabinet. Line the side up so that the front and back ends are flush with the front and back boards of the cabinet frame. The top of the cabinet side should be flush with the top of the cabinet frame.
Secure the cabinet side in place with clamps. Place the clamps horizontally at the front and rear of the cabinet frame. Tighten the clamps.
Turn on the air compressor. Attach a staple gun to an air hose.
Insert 1¼-inch staples into the staple gun. Follow the directions provided in the staple gun’s owner’s manual pertaining to loading procedures.
Shoot a staple through the front of the cabinet side to connect it to the top of the cabinet frame. Place another staple near the bottom of the front of the cabinet side. Add staples approximately every 3 or 4 inches along the edge of the front of the cabinet side to attach it to the front of the cabinet frame. Staple the back of the cabinet side in the same manner.