Integrate the 4-Way Switch into the Circuit

What happens here

The instructor explains that a 4-way switch is introduced when there's a need for an additional control point in a circuit, such as in a 'super long hallway'. The 4-way switch intercepts the traveler wires that normally run directly between the two 3-way switches. To wire a 4-way switch, one set of traveler wires from the preceding 3-way or 4-way switch is connected to the 'top' terminals of the 4-way switch, and the other set of traveler wires (going to the next 4-way or 3-way switch) is connected to the 'bottom' terminals. It's emphasized that it doesn't strictly matter which set goes to top or bottom, as long as each pair is kept together.

Goal: Learn how a 4-way switch is physically and conceptually connected within a multi-location circuit.