Synology CS407 Quick Installation Manual page 5

INSTALL HARD DISK
4
The 4 black connectors on the mother board are for SATA cables, and the 4 white connectors are
for hard disk power cables. You can see the disk identity numbers printed beside the connectors.
5
Connect the 4 hard disk power cables.
6
Connect the 4 SATA cables. The longest one should be connected to the HDD 1 connecter.
7
Place the hard disks into the hard disk tray with connectors faced outside. The top hard disk is HDD
1, and then HDD 2, HDD 3, and HDD 4.
HDD power cable SATA cable