The Renishaw probe does not connect in the same manner as the standard probes. To connect the Renishaw probe, unscrew the standard probe and set it aside. You'll see a bronze set screw on the tip of the arm. (under the location where the standard probe was connected) Remove the brass set screw, and attach the Renishaw probe in it's place.
When finished use extreme caution when putting the set screw back in place. If tightened or screwed too far down it will damage the connect pin and could void warranty if improperly installed.
See below for PDF out of the FaroArm Accessories Manual
Click here to download: Renishaw Probe