There are two cables but the installation only asks for one to be used. What is the other cable for? The Gainsborough Freestyle Trilock has: Main Loom – that needs to be connected when installing the lock Door Sensor Cable – that is to be used when you have the Wi-Fi Bridge with Door Sensors Related articles How long are the batteries expected to last? How does Gainsborough Freestyle Trilock work? I cannot find my Wi-Fi Bridge on the App The batteries have gone flat and I don’t have the spare key. How can I get in? What if I lose my phone?