Have traced the 2 wires from the rocker switch to the vfd
Red wire goes into vfd UX1
Black wire goes into GND on vfdClick image for larger version.  Name: IMG_20200904_155707.jpg  Views: 1858  Size: 223.5 KB  ID: 28797Click image for larger version.  Name: IMG_20200904_155737.jpg  Views: 1905  Size: 304.7 KB  ID: 28798