Samsung SW-252FENS - Manual (Page 8)

To install your CD-R/RW Drive in the PC, proceed as follows.
Installing the CD-R/RW Drive
Connecting the Cables
Setup
Make sure that the PC is powered off and disconnected from any power source.
If necessary, attach a horizontal bracket to both sides of the drive.
Remove the cover from a free expansion slot and install the CD-R/RW drive, as shown in the illustration.
Important: Use the fixing screws provided with purchase and make sure the screws are tightened
securely.Insufficiently tightened screws may cause increased noise.
(Screws for use: M3 X 6 X 4 pieces)
Make sure to use the standardized screws supplied (M3 X 6).
(To use screws other than M3 X 6 may result in malfuction.)