Just to ease the pain of self-proclaimed "electronic dummies" who ask tough questions regarding "how to wire a switch", here is a small gizmo that can tell you when a circuit is open or closed.
Actually, the best is a $20 multimeter but let's start with that.

You need a battery and a bulb , any battery, any bulb as long as the voltage of the battery is not higher than the voltage of the bulb, polarity is not an issue.

Test your contacts with A on one B on the other, if the bulb lights up circuit is closed, and vice versa.