The SLK3700-BQE, like a number of other Antec cases, has sideways facing hard drive mounts. To install the hard drive, you first slide out the little removable tray, and then attach the drive via the bottom screws. The hard drive trays are fitted with 4 rubber grommets, and the drive is attached using the special spaced screws, all part of the effort to make the system as quiet as possible.



Link: OCAU