Progressives on WMS machines usually plug into the SPN bus as do the stepper reels. There is a connector on the backplane that looks like an ethernet port (it's not, it's the spn bus). If there's a cable plugged into that, follow it to what is probably the stepper reels controller. There should be an empty spn plug there. You can just use a standard ethernet cable to connect that to the meter. The blade steppers have a taller topbox than the video blades, I don't know if you also changed that or not. Usually the meter mounts inside the top box at the level where the progressive window on the topglass is located. Sometimes the SPN bus provides power to the meter, if it does not, it is going to be either 5 or 12v or 24v, usually through a 2 pin white molex connector. I don't have a blade stepper so I couldn't tell you what the voltage for the meter would be.