I have a 4 input combiner for the panels. After running the 6 awg wire to the panel array for grounding it has been said to connect that 6 awg to the ground bar inside the combiner and then through conduit (along with panel array wires) and connect that 6 awg wire to the inverter ground. whew. Now that all that is said what if the combiner box doesn't have a ground bar but has a lightning arrest din module connected to the negative leads and that has an unused output. Is that ground for the 6 awg wire? See pic. Thanks