Just found these diagrams in the Regulators manual

, seems a battery charger via a generator, can be connected to the batteries..? Still cant confirm if this can be run while the panels are also charging the batteries..? I imagine so..?
Also not sure what
7) (Generator/load) dry contact enable switch
and
13) (Utility/Generator) dry contact OFF interface
are, in relation to all this..?
Any idea..?
Mike