I've gone through a few dozen different threads, videos and whatnots, and can't seem to figure out how to wire up my new 3-way switch.
Let's call the top of the steps Switch A and bottom Switch B.
Switch A has Five wires coming into it. Black and White from a 14/2. The WHITE wire has 122v on it. Next wire is a 14/3 with red, white, black (and ground). NONE of the other wires in this box have electricity. I tested each one by connecting meter from wire to ground.
At Switch A, the WHITE that's hot is connected to the BLACK of the 14/3. The remaining wires are all connected to the terminals on the existing switch.
Switch B - has three wires coming in on a 14/3 red, white, black (and ground). NOTHING has electricity on it.
Manual for Primary Switch: https://images.homedepot-static.com/catalog/pdfImages/71/718869d3-e92c-456b-9c97-cbf8018d3850.pdf
Manual for Add-on switch: https://images.homedepot-static.com/catalog/pdfImages/33/334dd232-b90b-4001-93de-5a489bda7e9d.pdf
I can't seem to figure out how to connect the Primary and add-on switches. ... any guidance would be appreciated.