Has anyone installed the MFC 8 switch Power Distribution Center? It has one part I'm unsure of the purpose. There is a 4 pin harness that goes to the switch, that makes sense. There is also a 3-pin harness that ends in 3 bare wires that I have no clue what to do with. Any ideas? There are no directions available for this unit and the item they ship looks nothing like the item on the website so it's a little corn fusing.