I am attempting to install a Caseta 3-way dimmer solution in place of an existing Diva 3-way dimmer. I am having trouble identifying the common wire to "tag". In my box, I see the following connected (between the wires on the Diva and the wires in the box)Diva wallred redgreen copperblack whitered/white blackhttps://imgur.com/a/2zV0IkDIn the other switch, there was a leviton 3-way wired much more straightforwardly as:white to black screw (common)black & red to travelerhttps://i.imgur.com/obAPtnP.jpegWhat I can't figure out here is what is the "common" wire to tag? All the documentation says to the "different-colored screw" but I'm not sure what that is in the case of the Diva, which has no screws but only different-colored cables. copper to green screw (ground)