@jpjacobs, JP, I have two limit switches. One on the X axis and one on the Y axis. I already have 2 ground wires for the X and y limit switches. No, I need two wires for X minus and X plus. Then I need two wires for Y minus and Y plus. I have an orange and white wire hooked up to the minus side for X and Y. If I close either limit switch a red led on the Ruida control lights up. I will check later today when I get home to see if these two wires go to the limit switches.