I would like to add a new light fixture to a 3-way circuit in my stairway. The new light will be closer to the second switch and therefore would like to wire it from there (the other fixture is in the ceiling of the second floor - so pretty far away).
The current circuit is as the following diagram:
How can I connect my second fixture on the second switch? Can I use the ground of my romex between the two 3-way switches to pass the neutral for my light?