As Norton states, it is simply procedure to do. Down load the install manual if you have not, already, and follow clear instructions. I installed my first on the K Line St Fe Berkshire in 2012. Changed out the K Line/Lionel cruise board for the ERR CCM, along with newer can. The ERR CCM controls cruise with back EMF from the motor, do not need the can with rpm reader circuit. Very happy with the improvement in slow speed control. Have performed a couple more since then on other K Line engines, including the Rock Island E8s. Excellent choice, IMHO.
Jesse TCA