Dell PowerVault 775N (Rackmount NAS Appliance) - Manual (Page 42)

8. Ensure that the PERC card is installed in the same PCI slot in both PowerVault NAS systems.
9. On the first SCSI cable, connect the UHDCI connector to the PERC channel 1 connector on cluster node 1.
See Figure 3-3 and Figure 3-4 for PowerVault 770N NAS cluster configurations.
See Figure 3-5 and Figure 3-6 for PowerVault 775N NAS cluster configurations.
Figure 3-3. Cabling a Clustered PowerVault 770N NAS System to One PowerVault 21xS Storage System.
Figure 3-4. Cabling a Clustered PowerVault 770N NAS System to One PowerVault 22xS Storage System