I can’t seem to upload pics it says the files too big I have a brown box outside with wires running up to my living room that I assume was for the virgin tv and I have wires running in to my dinning room that I think was for the hub but I don’t have a plug in dinning room for the hub I do have a plug up the stairs but it look old and the socket is on the bottom of the box pointing towards floor
The socket on the bottom of the box pointing to the floor sounds good. The cable you have been sent should either push fit over or screw on. The Virgin tv cable and internet is the same cable coming from the box outside. So as long as you connect to a cable going to that outside box you are in with a good chance.
The idea of pushing the new cables plug over the threaded connector on my VM wall jack (rather than screwing it on as per when I was last a VM customer) had me wondering too but the next day after setting it all up, it seems to be working ok.