On the backside of the DSI, you'll notice a plastic panel with two screws off to the side. Unscrew both screws using a #00 Phillips head screwdriver or an appropriately sized screwdriver bit.

Unscrew both screws using a #00 Phillips head screwdriver or an appropriately sized screwdriver bit. The screws will stay with the panel during removal.

Lift the plastic panel up and away from the DSI. If the panel stays in place after unscrewing, hold the DSI upsidedown and gently tap the device. This should free the panel.