I was mistaken, I checked the two extra wires connected to the battery and they do NOT go to the factory solar panel. Smaller orange is associated with the battery disconnect and the larger red one is associated with the charger/inverter.
I then opened the BCC, using the schematic from Intellitec's site I checked the voltage to the solar wire connection. 17.7V coming from panel on this partially overcast day.
Then covered the solar panel with a blanket and got ~4.5V.
Now I just need someone with solar system knowhow as to what I do for adding my two extra panels.