I'm just finishing up the assembly of my new 48x96 Standard. I'm attempting to connect the Yaskawa VFD to the 2.2 HP spindle. I've been over the documentation several times and did several forum searches with no relevant results relating to my problem. I've connected the 220VAC leads and the brown wire to the control box, but I'm left with a gray wire from the VFD that terminates into a RJ45 phone jack style connector that then is plugged into a Delta female USB port (the sample type of port you would find on a USB extension cord or built into your PC). Since I can't plug this into my PC, where does it go? I'm assuming it has something to do with the spindle speed.