Use a Phillips screwdriver to remove eight screws from the right side of the Cricut:

Two 10.2 mm‑long screws securing the right end top metal track, which include a washer and a locking washer.

Four 10.0 mm‑long screws securing the large white plastic bracket.

Two 7.9 mm‑long screws securing the large white plastic bracket, which include white plastic spacers.

Check that the tool holder slides freely with the top metal track fully seated before re-installing any screws. If it doesn't, you may need to tilt the top of the tool holder forwards slightly so it's completely in the top track.

Reconnect the motor ground wire to the right-most screw that secures the right end of the top metal track.