I recently purchased a 2000 Regal 1800 LSR. This boat did not come with an owners manual, but I'm fairly familiar with boats as I have been around them for twenty years, however I cannot figure out what the 4 pronged female plug that is located in the bow just above the navigation light is for. Can anyone who owns a Regal 1800 LSR tell me what this is for? Thanks for your time, Eric