Use the tip of the blue plastic opening tool to gently flip-up the grey locking flap of the three ribbon cables on the bottom right corner of the motherboard.

Make sure to only lift the flap and not the connector socket because the socket easily breaks off.

Grab each ribbon cable and gently pull away from the socket.

To reinstall, insert the ribbon cable into the connector and close the flap on the black line.

Move the ribbon cables away from the motherboard.