Lift the top cover of the device from the front, don't completely remove it yet though, because there are still wires connecting both halves. (NEED PICTURE)

Behind the left-most pedal, there are two 7.4mm screws attaching a wire to the top cover. Remove these with a Phillips #1 screwdriver and release the wires.

Once the wires are no longer connected to the top cover, remove the cover completely.