First connect two sensors to the first PL-LY splitter, then connect it to the Level 1/2 port on your P4. Once you do that, identify which sensor is Sensor1 and Sensor2 by going to the LEVEL settings page and looking at the Settings and states level-sensor at the bottom of the page. As you trigger each sensor, an (X) will appear and disappear in the State (direct) column.

With Sensor1 identified, select an unused control circuit and set it to AUTO TOP OFF. Make sure to select Sensor1 as the sensor being used for this function. Specify the max on-time for this function. This is a failsafe feature which will shut down the function and assigned outlet in case the sensor or socket does not react within the allowed max time.

For sensor 2, select an unused control circuit and set the operation mode to LEAKAGE DETECTION. Make sure to select Sensor2 as the sensor being used for this function.

Identify sensor 3 and 4 when they are connected to the second PL-LY on the Level 3/4 port. Sensor 3 and 4 should also be set to LEAKAGE DETECTION.

We have a video which shows you how to setup a 1-sensor ATO function here:
https://www.youtube.com/watch?v=bNpl...eNOkcebAh-iCL8