Stand up each cabinet to be hung so its backside is accessible to you.
Position the hangers in the upper corners of each cabinet and trace the outline of each hanger with a pencil to mark its position. Remove the hangers and set them aside.
Examine the hangers. They likely have an opening in their centers. Measure this opening and find the corresponding position on the cabinets in the outline you drew. Use a drill to open up this section on the cabinets by making several holes right next to one another.
Examine the cabinet hangers. They will attach to the backs of the cabinets at their tops and bottoms, or on one side. Place them back on the cabinet and mark the position of where each hole needs to be drilled on the cabinet back or side stile. Drill the holes in the cabinet.
Place the hanger back on the cabinet and screw it into place.
Measure the wall where you intend to install the cabinets. Use the measurements that accompany the cabinet hangers to find the correct height and position to install the wall hanger portion. Mark the wall with a pencil.
Drill the requisite holes in the wall, and place plastic anchors in each hole. Line up the wall hanger over the holes and screw the hanger into place.
Hang the cabinets by lifting them into place so the cabinet hangers interlock with the wall hangers.
Open the cabinet doors and locate the holes you drilled in the back of the cabinet. Screw through these holes into the wall hanger behind the cabinet hanger portion to secure the cabinets to the wall.