Sony MX - Manual (Page 114)

To Replace the Side Panel
1. Carefully align the tabs on the side panel to the chassis frame. The side panel should lie flat against the chassis,
with approximately 3/8 inch of clearance between the front edge of the side panel and the front of the chassis.
2. Press the side panel firmly against the unit and slide it forward until the panel snaps into place.
Replacing the side panel
Page 114