I have done a bit of searching and I believe the FTM-300 uses a RJ12 6 wire plugs and connectors. Would just about any wire and socket combo work? I am looking to put a RJ12 socket somewhere on my dash and have a rather clean install when the radio itself is hidden under the center console. I will also have a remote speaker to hear of course. Am I correct in thinking that it is a RJ12?