Identifying which port is "A" or "B" on dual-port Mini-SAS PCIe connector

[jace.mogill1]

Please provide the following info (tick the boxes after creating this topic):
Software Version
DRIVE OS 6.0.5
DRIVE OS 6.0.4 (rev. 1)
DRIVE OS 6.0.4 SDK
other

Target Operating System
Linux
QNX
other

Hardware Platform
DRIVE AGX Orin Developer Kit (940-63710-0010-D00)
DRIVE AGX Orin Developer Kit (940-63710-0010-C00)
DRIVE AGX Orin Developer Kit (not sure its number)
other

SDK Manager Version
1.9.1.10844
other

Host Machine Version
native Ubuntu Linux 20.04 Host installed with SDK Manager
native Ubuntu Linux 20.04 Host installed with DRIVE OS Docker Containers
native Ubuntu Linux 18.04 Host installed with DRIVE OS Docker Containers
other

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Please help identify which ports of the Mini-SAS connector are A and B.
The C2C documentation refers to Port-A and Port-B of the Mini-SAS connector, but the individual ports are not labeled on the hardware, and the DRIVE AGX Orin Developer Kit Mechanical and Installation Guide does not indicate which port is which.

[JimWang]

@jace.mogill1

Port-A and Port-B of the Mini-SAS

Each NVIDIA DRIVE Orin devkit have one Orin soc chip, chip to chip communication through PCIe mean connect 2 NVIDIA DRIVE Orin devkits with mini-SAS cable, one is A and another is B.
Port-A or B refer to each of devkit, not the 2 PCIe ports on same devkit.
Thanks.

[jace.mogill1]

I am not trying to connect this machine to itself. I am connecting two Orins, following Nvidia’s documentation for how to connect two Orins, as I noted. The documentation describes Port-A and B of a single Mini-SAS connector, but they are not identified anywhere.

My question is about the Mini-SAS connector itself, which has two ports, as seen in the figure. An upper port and a lower port, both on the same Mini-SAS connector. One is Port-A, one is Port-B, but they are not labeled.

[JimWang]

Upper port as A and lower as B.