Hi, I have a remote mike and speaker for my VHF radio. I have taken a couple hundred feet of wire out of the boat so far and lost track of the wiring between the "base" and remote station. Coming out of the base is a four conductor wire with very serious (thick) insulation. Are two of the four intended to run to the ext. speaker? If yes, any idea which two? Thanks, Tim Pinkham Dover, NH La Juin