Based on the "Wiring the 2013 FRC Control System" guide
1 found linked from the "Getting Started With the 2013 Control System" guide
2 linked from "2013 Technical Resources"
3 linked from the FRC Game Manual
4,
You can use the following picture to wire your cRio appropriately:
http://wpilib.screenstepslive.com/s/...age_id=1787517