I like the plug and play idea. This switch attaches to the side of the Kato Power Pack (#kat22-014), then you plug your wiring from the turnout into this switch. As simple as that. Note: This does not come with any wires. It is just the switch. You would be well advise to purchase the turnout extension cord 35 (#Kat 24841) with this. However, you do not need to.