Covo , those two wires are for a load I believe , or you can run a light globe during the day or , nah I think it's for a load if you need one , most don't .
The really good Morningstar pwm regulators can divert power to elsewhere as the battery gets charged , instead of the power being reduced it sends the extra unneeded power to a load , usually something like a heating element for water .
It won't heat it up to scalding heat but will heat it up .
So don't worry too much about those two connections worry more about the others .