SH68-C68-S, PXIe-6739 PXI Analog Output Module Connector—The NI-6739 mounts to the front of the PXIe-6739 PXI Analog Output Module and adapts the PXIe-6739 pinout to the PXI-6739 SH68-C68-S cable pinout. The NI-6739 helps you upgrade without changing SH68-C68-S cables that have already been installed.