CAME MS-N5016-UH Manuel De Configuration Et D'utilisation page 41

Check that the screws in the HDD
bracket are securely tightened.
Fasten the bracket to the device with
the central screw.
Connect the power cable and the data
cable to each hard disk and close the
top panel up again.
Put the hard disks onto the bracket, inserting
the protruding screw heads into the relevant
housings; slide the hard disk in as shown in the
diagram and then tighten the screws.
Insert all the hard disks into the relevant slots,
and replace the bay in its housing.