AUX I/O port on NI 5732

I have an NI-5732 adaptor on PXIe-7975r,now i want to read data from DIO ports on IO module.I consulted NI 5731/5732/5733/5734R User Guide and Specifications and it says that :

1.Use any HDMI cable with the provided ferrite bead to connect to the digital I/O and PFI signals on the AUX I/O connector.

2.The AUX I/O connector accepts a standard, third-party HDMI cable.

Im confused because several problem:

1.How do i read data through AUX I/O connector ?

2.What kind of adaptor or other divices do I need to connect to NI 5732 through the cable and how could I get one ?

3.Any extra module,driver or software do I need to use?I got an NI 7975r FPGA and FPGA,FlexRIO module.

If there is any unclear expression, I apologize for that.