The C800/800+ Specification and Installation : Mounting the Cloud Storage Gateway in a Rack
  
Mounting the Cloud Storage Gateway in a Rack
Install the rack mount kit observing the front and rear markings. Use the supplied screws to attach the parts into the locating holes on the side of the C800. The rack mount parts have left and right markings which represent the front facing portions of the kit. If required install cage nuts or screw the parts directly into the racks.
Make sure at least two screws per side are used to secure the bracket at the back.
Once the rack mount parts are installed, slide the C800 flush with the vertical rack struts and then install the Allen key bolts. Tighten the bolts by hand just enough to prevent the unit from moving once installed.