Which TV box do you have - is it a TiVo or V6? if you're not sure, check here - it only really matters for the internet connection.
Whichever you have, it'll have a co-ax cable coming in which carries your TV signals - VM can move this, as mentioned, for £25. The box will also have an HDMI lead to your TV.
If you have a V6, the box will also have a connection to your homehub for the internet - which will either be Ethernet cable or wireless.
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