3.0ltr Duratec V-6 Engine Block Drain Plug Location

I've got an '05 Merc Sable with the 3.0ltr V-6 Duratec DOHC and would like to change the coolant out in it. Looking under there I see a couple of allen type plugs. Not sure if these are for coolant drain or not. One is right above the oil filter. Does anyone have frst hand experience that they might want to share? Thanx in advance.