Asus CRW-5232A User Manual page 20

3. Secure the drive with screws that came with the drive package. Use
two screws on each side of the drive.
Depending on the space on your chassis, you may need to connect the drive
cables before securing the drive into the chassis. For cable connections,
proceed to the following section, "Connecting the Drive Cables."
20 ASUS CRW-5232A User Manual