Hi , there are a few scenarios depending on the age and the build of your house . Generally speaking , houses built in the last fifteen years or so would have been wired internally inside the plasterboard of the walls and lead out to an external terminating unit (ETU) box usually at the side wall of the house. If it's an older house not wired internally then the cables may have been ran down the outside wall and drilled in through to the individual points . In this case they may either be going to a tap box from a service provider like UPC at the fascia board below the gutter , a satellite dish on the outside wall or chimney , or an aerial on the roof .