wrap them all up together in wire ties or electrical tape or something like that.
This approach gives you more flexibility if you decide to change something on the panel like adding some admin buttons (Coin, Start, Pause, Exit, etc.) with LEDs.
- If you're concerned that the excess daisy chain might shift and short against something, you can cover the ends with a plastic bag or saran wrap and secure the covering with rubber bands, twist-ties, or electrical tape.
- You might want to use a "buddy tab" (fold the end of the tape over on itself) if you choose electrical tape so it's easy to unwrap.
If you're sure you won't want to add any more LED buttons, you can cut off the excess.
Scott