Samsung SH-M522C-CSWN - Manual (Page 9)

Setup
To install your COMBO Drive in the PC, proceed as follows.
Make sure to use the standardized screws supplied (M3 X 6). To use screws other than M3 X 6 may result in
malfuction.
Installing the COMBO Drive
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 COMBO drive, as shown in the illustration.