On A 3-way, there’s an additional terminal, called the “widespread.” Power comes in towards the switch over the widespread, then two “traveler” wires hook up the main switch to the 2nd about the brass terminals. Utilizing a screwdriver, cautiously remove the screws that hold the previous plug alongside one another. https://zaneaohyv.smblogsites.com/34811658/about-wiring-to-switches