Hi Hannah, glad you reached out. Wiring the System Sensor 2351B is relatively straightforward. First, ensure power to the circuit is off. Then, connect the red wire to positive (+) and the black wire to negative (-) terminals. If it’s a two-wire connection, simply connect the red wire to the positive (+) terminal and the black wire to the negative (-) terminal. Remember to follow local electrical codes and manufacturer instructions. If you have any specific questions or run into issues during installation, feel free to ask for further assistance!