In order to install a wall kitchen cabinet, their positions need to be determined accurately. Using a level, draw a line in pencil on the wall where the bottom and the top of the cabinets will be. Double and even triple check the dimensions of the cabinets with your pencil measurements.
Attach a temporary support rail, with a dimension of 1X3 securing it with several two-inch screws. Make sure it is attached to one of the wall studs for stability. Align the lower edge of the cabinet with the top edge of the support rail.
Drill a small hole, known as a pilot hole, into the sturdy part of the backside of the cabinet or into the support rail where the wall stud is located. Once the cabinet is in the correct placement the unit can then be screwed firmly into the wall using a couple of screws. The screws should penetrate the wall studs by one and a half inches.