Disconnect the 2-pin connector (in red box) connecting the locking solenoid to the main PCB.

Remove the 4 M2 screws (red arrows) that fasten the locking solenoid.

The locations of the screws may be obstructed by the robot fairing, PCB, and the black cap.

Rotate the robot (see step 3) and shift the black cap around (see step 4) to gain access to the screws.

Be careful not to damage any cables or protruding electronics.