electrical - Is it possible to wire up multiple 4 way switches with power coming into one 4 way and the lights connected to the other - Home Improvement Stack Exchange
Tutorial: 3-Way Switches and 4-Way Switches
Tutorial: 3-Way Switches and 4-Way Switches
Wiring a 4-Way Switch (DIY)
Is it possible to use Kasa with 4 switches to 1 light? - Smart Home Community