M.2 drive backplane cable routing
This section provides cable routing information for the M.2 drives. 
•  Based on different drive types, the M.2 drive backplanes differ. Thus cables, connector layout and the 
cable routing are also different.
•  For the locations of M.2 connectors on the processor board, see 
“System-board-assembly connectors” 
on page 33
for details.
•  The following illustrations and tables list the M.2 drive backplanes supported:
– 
“Cable routing for M.2 SATA/NVMe drive PCIe 4.0 backplane” on page 239
–  “Cable routing for M.2 SATA/NVMe drive PCIe 3.0 backplane” on page 241
Cable routing for M.2 SATA/NVMe drive PCIe 4.0 backplane
Figure 180. Cable routing for M.2 SATA/NVMe drive PCIe 4.0 backplane
Chapter 6. Internal cable routing 239