HP Pavilion Slimline s5220f Supplementary Manual page 14

2 Connect the cables to the drive.
Your drive may have three or two cables.
3 Push the drive into the computer until it locks in place.
6
4 Insert the three tabs on the front panel into the slots on
1
5 Swing the front panel toward the computer, and press
2
— Removing and Replacing the CD/DVD Drive
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the computer.
it into place.