Yes, not all companies provided the 5C260 cable with the LMU2620. As a courtesy to our customers we add this cable to every LMU2620 purchase. This allows for excellent forward compatibility should you decided you want extra features in the future. This same cable is used for PTO. When installing, make sure the Input-1 wire (should be blue wire) is tied into the PTO. When engaged it should be a high (>4.5vDC) and when off should be a float or ground, it is recommended to check with a multimeter to ensure functionality.