Dell Precision 370 - Manual (Page 59)

4. From the outside of the computer, pull the insert away from the computer's front panel.
5. Remove the insert from the insert frame by pressing on the four tabs.
1 insert frame for CD/DVD drive bay
2 insert frame for floppy drive bay
6. Reattach the empty insert frame over the front of the drive bay.
The insert frame fits only one way.
a. Face the front of the computer and slip the left side of the insert in to the left side of the drive bay opening.