Compaq 247320-003 - Deskpro 4000 - 5166 Model 2500/CDS Reference Manual page 88

The configuration label located inside the computer cover
provides additional expansion slot and switch setting
information.
To replace the computer cover, complete the following steps:
1. Holding the cover in an almost vertical position, hook the
front lip of the cover behind the front bezel. Then, rotate
the cover down on the unit.
2. Slide the cover latches on the sides of the computer cover
toward the back of the computer to secure the cover.
To install optional drives, you must remove the front bezel to
gain access to the slide-out drive cage.
To remove the front bezel, complete the following steps:
1. If you have locked the Smart Cover Lock, use Computer
Setup to unlock the lock.
For more information about Computer Setup, refer to
Chapter 8, "Using Compaq Utilities."
2. Turn off the computer and any external devices.
3. Disconnect the power cord from the power outlet.
4. Remove the computer cover.