While the clamp is open and the screwdriver is driven into the rectangular side of the terminal, place the conductor into the round side where the clamp is open. While holding the wire in place, remove the screwdriver and the clamp will close down on the conductor and hold it in place. Simply continue to do this for all circuits. Each circuit is a feed through terminal, which means that the wire on one side of terminal #1 will connect to the opposite side of terminal #1 and so on.