I think I have a regular 2-way Switch but there are 3 wires connected to it: 2 black wires going to the same screw and a red one going to an upper one. I'm not sure which wire is doing what. How can I identify or know which wire is which? The new switch I have is a smart switch and it's asking me for 2 live, 1 ground, and 1 neutral. Inside the box I could find the neutral wire and also a copper wire, but I don't know the others.