Dell Precision 490 - Manual (Page 73)

5. If another device is installed in the FlexBay, remove that device (see the appropriate removal instructions in this section).
6. If the FlexBay is not populated and metal shields are present in your computer (see About the Metal Shields Present in Some Drive Configurations ),
remove the vented metal insert:
a. Pull the vented metal insert forward until its surface is flush with that of the surrounding chassis.
b. Rotate the bottom of the metal insert up towards you, disengaging its lower screws from the surrounding metal.
c. Lift the metal insert from the computer, disengaging its top screws and metal tabs from the surrounding metal.
7. Remove the FlexBay drive-panel insert (see Removing a Drive-Panel Insert ).
8. If no screws are attached to the drive, remove the shoulder screws from the inside of the drive panel and attach the screws to the new drive.
1 drive retention insert
2 floppy drive
NOTICE: If metal shields are present in your computer configuration, they must be installed at all times while your computer is in use or your computer
may not function properly.
1 FlexBay
2 vented metal insert