Connect both buckles as shown. Make sure the straps are not twisted. Tighten the straps by pulling down on the free end while keeping the handle in the center of the top of the case. Only the tension on the straps prevents the computer from sliding from front to back. The harness will stretch and conform slightly after attached.
Computers are sensitive equipment, so handle with care.
Remove the female buckle and feed the CableGrip past the folded end of the strap. This is a tight fit, but with patience it can be done. To add a CableGrip the process is simply done in reverse. Place the foot of the monitor in the middle of the foot loop and guide loop around the foot. This may be easier to do with the monitor on its side.