Dell OptiPlex GX260 - Manual (Page 66)

Check the documentation that accompanied the drive to verify that the drive is configured for your computer. If you are
installing an IDE drive, configure the drive for the cable select setting.
2. Gently slide the drive into place until the tabs securely click into position.
3. Connect the interposer board to the CD drive:
a. Ensure that the interposer board tab fits securely under the notch on the inside of the cover.
b. Attach the power and audio cables to the interposer board.
Connecting the Interposer Board
1 interposer board
2 notch on inside of cover
3 interposer board tab