Locate the side-bracket mounting areas along the outside top of the dishwasher frame. Search for two vertical screw holes. Place a side bracket in position, matching the screw holes in the bracket with the screw holes in the frame.
Attach the mount to the frame using two mounting screws and a Phillips-head screwdriver. Position the bracket so the opposite end -- the end with only one screw hole -- is both above and forward of the mounting area. Mount the other side bracket to the opposite side of the dishwasher in the same way.
Slide the dishwasher beneath the granite counter. Position the dishwasher so its front door is flush with the front of the adjacent cabinets and is centered between the cabinets.
Mark the area on each cabinet where the dishwasher side-mounts will be attached. Slide the dishwasher out from under the counter.
Squeeze construction adhesive onto one side of each 3-by-3-inch piece of 3/4-inch plywood. Place the glued side of one piece onto the marks you made on one cabinet side. Hold the plywood in position using a C-clamp. Repeat the process on the other cabinet with the second piece of plywood. Allow the adhesive to dry completely before removing the clamp.
Slide the dishwasher back into position beneath the counter. Place a 1/2-inch wood screw through each side-bracket mounting hole. Screw each screw into the plywood, using a Phillips-head screwdriver. Drive the screws until they are flush with the bracket to avoid interference when closing the dishwasher door.