So I going to do a direct wiring to my battery for the bow Helix 12 mega. Here is the part I am confused about. I read alot of people say use at least 14 gauge or bigger wires but what is the point or logic of that when the last six feet of wire running to the humminbird is only 18 gauge? It's like buying a extension cable that is 14 gauge but have 18 gauge end?