Step 3: Wire it up
Lets get on to putting this together. The battery box I used (Same as in the previous link) came with 6 inches of wire attached. We'll use that extra wire to connect the positive lead (Red) to the switch and then to the positive bus. On the negative side it will just connect the negative lead (Black) directly to the to the negative bus on the breadboard.
That's all there is to it wiring it up