I have purchased a Global cruise control package (w/o cruise control wand) and I have a GM cruise control wand for a circa 1975 GM column. My problem is the Global wiring harness has a four-wire connector (black, blue, red & green) and my GM wand has a five wire connectorblack, blue, red, green and yellow). Does any body know if the yellow should be paired up with another wire or left out of the final set up?