I'll soon be installing a MultiPlus 12-3000-120 and I'll be using SOOW 6/4 cord for the Mains in and out. Each conductor has 133 fine copper strands. I'm a bit concerned about connecting this wire to the Mains in/out lugs of the MultiPlus. Should I consider using 4/0 ferrules? And would they fit in the connector hole of the lug of the MultiPlus?