I don’t know exactly how your boat is arranged, but my B36(2002) has a toilet or heads compartment adjoining the forward cabin. Within that compartment, and inside a small cupboard over the wash basin there is a European style two round pin mains electric power socket. Maybe you have the same. I connected into the back of that socket using what we call “Arctic” cable, similar to the type of cable you have for your portable mains supply lead that you use in a marina. I understand that it is important that you use flexible cable rather than non flexible domestic cable used for household wiring as the flex can withstand the boat movement and vibration better than the solid cores used in domestic cabling. I was able to take that cable from the back of the socket, and through an adjoining cupboard which contains the black water holding tank and connect it to a new domestic type of power socket fitted into the dividing bulkhead between the forward cabin and the heads compartment. If the socket needs to be on the other side of the boat then the cable could be lead through the storage area under the bunk and be kept out of sight.
Lastly, no I don’t watch TV while in the forward cabin, but it can get quite cold while staying onboard overnight while visiting the boat to carry out winter maintenance, and some of us who have nothing left to prove, like an electric blanket to take the chill off our sleeping arrangements ☃️
