I now have a single light fixture contolled by a pair of 3-Way switches. The 2-Wire+ground power goes to the 1st switch. I have easy access to the 3-wire+ground cable as it leaves the 2nd 3-Way switch. I want to add another light fixture between the 2nd switch and the existing light fixture. Please advise which wires from the 3-wire+ground cable coming from 2nd switch that I should wire to the new fixture to make a proper connection. Can I simply tap the white and black wires for connection to the new fixture, then connect a pigtail from ground to the fixture box, and let the red wire pass through uninterupted?