Hi Actechy,
National Instruments does not offer a cable assembly. You can either use the screw terminal block or create your own cable assembly.
If you go to the 2527 product page, click on the Specifications Tab >> Detailed Specifications >> NI-PXI-2527 Specifications >> View.
On page 4, we list some connectors from AMP, which is sold by Tyco Electronics, that can be used with the switch.
Here is another thread that addresses your issue:
PXI-2527
Thank You,
Nick F.
Applications Engineer