Asus ESC500 G3 - Manual (Page 34)

Chapter 2: Hardware setup 2-14
5. With the HDD label side up,
carefully insert the drive into the
3.5-inch bay and push the drive
into the bay until its screw holes
align with the holes on the drive
bay.
4. Swing the HDD cage outwards.
6. Push in the bay locks to secure
the hard disk drive in place.