Glides are on the top of the cabinet, and are used for transportation.
Place the cabinet in position
Upper cabinets can either be held in place, or supported by a stand. If you're holding the cabinet in place, use a clamp to secure it level.
Drill pilot holes
Using 28mm screws, screw from the inside of the cabinet through to the other cabinet at the front and back to secure together
Place the front screws to the front of the hinge plate, so that they will be hidden when the door is on. Screw the first cabinet to the wall before adding any others. For every additional cabinet, first secure to the cabinet alongside, and then to the wall.
Once cabinets have been secured to each other, secure them to the wall