On a three-way, there’s an extra terminal, known as the “prevalent.” Power comes in for the switch to the typical, then two “traveler” wires link the very first switch to the 2nd about the brass terminals. Utilizing a screwdriver, very carefully take out the screws that hold the outdated plug https://wiringtolights31851.blogscribble.com/34898118/5-simple-statements-about-smart-switches-for-home-explained