I installed a Leviton smart switch in a 3-way circuit and the corresponding coordinating switch in the picture (right switch). The lights function as they should using both switches.
However, I recently was about to install another switch on left side of the box, when I looked at the coordinating switch and discovered that I probably wired it incorrectly. I believe I erroneously connected the neutral terminal on the coordinating switch to the neutral of the other circuit.
The circuit on the right only has one cable coming in with 3 wires: red, black and white. I believe the red is a traveler, black is the line/traveler and white is the neutral. The instructions for the switch had me capping off the black wire.
In this case, would I need to connect the neutral of the coordinating switch to this yellow wire cap with the the black and white?