I have a 2017 Sundancer 350. The coaxial input for dockside cable/internet is in the port side transom with the shorepower input. The boat is equipped with a TV in the cockpit as well as one in the Cabin above the distribution panel. I contacted Sea Ray to inquire into where there might be an output within the cabin to plug in the cable modem. I was instructed that the main splitter is found behind the TV. I located the main splitter. It has one input and four outputs. Three of the outputs have cables connected. It is my assumption that two of the output cables run to each TV. I am curious as to where the third runs to, and am hopeful it is somewhere in the cabin that would be conducive to placing a cable box or modem. Any insight into this is much appreciated!