16i RAID/HBA adapter + onboard connectors
The following shows the cable connections for the 12 x 3.5-inch Anybay configuration with one 16i RAID/ 
HBA adapter. 
From To
Backplane 1: SAS 0, SAS 1 16i RAID/HBA adapter on PCIe slot 2:
•  Gen 3: C0C1
•  Gen 4: C0
Backplane 1: SAS 2
•  Gen 3: C2C3
•  Gen 4: C1
Backplane 1: NVMe 0-1, 2-3, 4-5, 6-7 Onboard: PCIe 1, 2, 3, 4
Backplane 1: NVMe 8-9, 10-11 Onboard: PCIe 5, PCIe 6
Connections between connectors: 
1  ↔  1 ,  2  ↔  2 ,  3  ↔  3 , ...  n  ↔  n
Figure 138. SAS/SATA cable routing Figure 139. NVMe cable routing
Chapter 3. Internal cable routing 179