Don't use the corner post for radar output, it is a digital signal. Tie into the radar at the connector under the cab. To access it, roll the floor mat back and remove the access panel that is located under the clutch pedal. Use part number 72515753 from AGCO to Y into the 4 pin flat tractor radar connection. It will have a 4 pin round "standard radar" connector to then plug into the monitor.