Review on Aqara Water Leak Sensor: Wireless Mini Flood Detector for Alarm System & Smart Home Automation - Works with IFTTT by Aneta Kieszkowska ᠌

If you place the sensor in places where the sensor is immediately visible (in the kitchen sink and under the bathroom, for example), then you can fix the leak in several places with one sensor. To the bolt contacts located below, you can screw the wires and stretch them to the desired place for fixing the leak. Look, there were pictures here, how it is implemented.