Puzzletober 2025: Button

Now seemed to be as good a time as any to follow up on a promise, so before joining the others by the front door, the newcomer goes upstairs to room seven. Its resident awaits him.

He's told, "I heard you have an eye for detail. Perhaps you can help us plan the wiring in the hotel." A wooden board with a lattice of metal pins rests on a table in the center of the room. "That gent I was talking about earlier sent this through the post office. We collected it today." Some of the pins have LEDs soldered between them and a contact switch spans a space in the center. "This is a plan for a doorbell. When the button is pressed, a wire shifts position. The lights were put in for a challenge. We'll have to fit a lot of stuff in a rather thin region."

Rules: Plan wires spanning horizontally and vertically across the pins that activate every LED in series if and only if the button is pressed. Wires shouldn't branch or exit the lattice. An LED is activated if there is a connection from the plus pin to the minus pin that passes through the LED in the direction of the arrow. The circle segment acts as a wire when the button is on, and the cross segment acts as a wire when the button is off.

penpa link (no answer check)