Dell Vostro 220 (Late 2008) - Manual (Page 75)

Drives
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6 Slide the device out through the front of the computer.
7 If you are installing a replacement device, skip to step 5 in "Replacing or
Adding a Media Card Reader" on page 77.
If you are removing the device permanently and the drive bay is to remain
empty, proceed to step 8.
8 Disconnect the USB interface cable from the system board (see "System
Board Components" on page 40), and remove the cable from the
computer.
9 Install a 3.5-inch front-panel insert into the empty drive bay:
1 release latch 2 optical drive bay
3 media card reader
2
1
3