Pardon this novice question, but I just purchased a SmartShunt to monitor my two trailer batteries (12v / parallel) and have read though all the installation instructions and also viewed a number of the installation videos. I understand that the SmartShunt needs to be installed on the negative lead out from the battery, but in my case there are two negative leads. One negative traces back into the trailer itself and the other goes out to my solar panels. Will the SmartShunt monitor the batteries correctly if the "To System" terminal is only connected to the main negative lead for the trailer or do I also need to connect the negative solar panel lead to that "To System" terminal? The circular metal connector on the negative solar panel lead isn't large enough to fit the SmartShunt terminal so that will be a little more challenging if required. Thanks in advance for your help!