Comtech EF Data SDM-9220 - Manual (Page 51)

Hardware Installation
Memotec Inc. 4-9
3. To secure the lip of the cover to the rear of the unit chassis, replace the three screws
that you removed earlier. See
Figure 4-1 on “Removing the Cover from the Unit
Chassis” on page 4-4 for their exact location.
Figure 4-3: Replacing the Cover onto the Unit Chassis
Hook the cover over
the front panel.
Roll down over
the rear panel.