Enhanced Security HDD Option Type M10 (D792-09)
D255/D256/M281/M282 2-72 SM
20. Remove the seven screws from the controller box [A].
The screw [B] is a tapping screw. Be careful not to use the wrong screw when
installing the controller box.
21. Release the hook [A], and then remove the controller box [B] by rotating it
counter-clockwise.