The I-PAC 2 board needs to be connected to a PC and the WinIPACV2 program run, and select the "config" tab, then check the "Enable Expansion Interface" check box and click "apply".
Connect the adapter(s) as shown in the picture below. The wire colors RED and BLACK are marked on the board on the P1 side. The P2 side connects the same way.
Connect the USB cables to the console (or PC for Xinput Mode). Note you can connect the board to a console AND to a PC using its standard USB cable at the same time.
If using on a PC in Xinput (Xbox360) mode, install the Xbox 360 Controller Drivers from Microsoft.
Depending on your panel layout and requirements you may need to change the default control mappings. The steps to do this are as follows: