A socket adaptor 10 made of an electrically insulating material has a main adaptor body 12 on which a plurality of through holes 14 containing an upper opening and a lower opening has been formed. Furthermore, a hub with a tapering insertion region is disclosed, whereby said insertion region has a length of 40% to 96% of the total length of the hub. The installation of each of the grommets is achieved by inserting the grommet through the cut-out in a direction from outside to inside the casing so that a portion of the grommet protrudes from the wall into the casing. When the VOD Back Office receives a request from the computing device to view selected VOD content, the VOD Back Office sends an instruction to a Guest Headend Hub to set up a session with the Guest STB. The coil winding is directly electrically connected to the terminal cap.