Please view the below diagram to see how to wire your driveway alarm accessories to your driveway alarm system’s DRY CONTACT (no voltage) outputs.
If you are using the Voltage output of your driveway alarm make sure the voltage of the alarm matches the required voltage for your accessory and simply connect the positive and negative leads from your siren/strobe etc. to the positive and negative terminals on your driveway alarm system.

wiring a strobe to contacts