Hi, we recently bought a 2016 Sunseeker 2400R. In the area over the door there is what appears to be a cable input/output port. When I asked the service guy about it during the walk through he told me it was there to hook up the TV in the bunk area over the cab. Well after a short investigation I realized he was completely wrong as that TV was already hooked up to cable. What is that port for? I actually hooked up a TV to it and ran a channel scan and no channels were received. If it is for cable how do I make it work, I know I'm missing something and I can find it in any of the paperwork we got with the unit. Thanks in advance for any info.