And then we're going to take a 22 gauge wire and run it to the center of that terminal block, which is going to provide us five volts out that we can use to power our digital camera and our Arduino and other components on our board. The way you do this depends on the type of toggle switch you have. In most applications, there is no difference. Now as for the ground wire.
For example, a person might install a toggle switch in their car to operate an aftermarket interior LED light system.