Well...this was the best I could get...they won't release the board's schematic for "proprietary/competitive" reasons...might it be possible to tie into the COM1/WH terminal as that's where the sensor ties into? Ignore the "jump these" comment as she said that was a note to a different customer 
Additionally in the brochure from the other day, it does note the tank and well sensor "normal" status...
● Tank Sensor - 2 Terminal, Normally Open for Tank Full Detection
● Well Sensor - 2 Terminal, Normally Closed Terminals for Run-Dry Protection
● Speed Dial for GPM Adjustment
● Low Well Timer Dial - Set up to 30 min delay after low well condition is resolved
● 3-Way Exterior Shut-off Switch (Solar,Battery, Off)
● MPPT Pump Function (Maximum Power Point function is used to optimize the running of the pump motor with variable frequency based on available power)
● Pump Terminals (Labeled 1, 2, 3)
● Over Voltage Protection Diode
Thanks!
