To answer your question. Yeah, you can connect all three wires to the source. By doing that you are putting all three of those wires in parallel which means they will all be getting the source voltage. If you dont understand that you can look at it this way. When you are putting up christmas lights notice how when you plug one strand into another the lights get dimmer down the line. (That is considered putting them in SERIES.) If you plug each strand of lights in a different outlet, then they all get the same amount of voltage. (That is considered PARALLEL.) Hope that helps you.