@Very+Very+Fed+Up it sounds like you have been sent a Sky hub with cables for a full fibre connection. If you are due to have an engineer come to set up your service you have the right kit as the engineer will be fitting a new full,fibre line terminating in an ONTunit that will accept that cable. In many areas when you order a new broadband service Openreach require the ISP to fit full fibre as they wont accept a new partial fibre contract where full fibre is available.
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65inch Sky Glass, 3 Sky Streaming Pucks, Sky Ultrafast + and Sky SR213(white Wifi Max hub) main Wifi from 3 TP-Link Deco M4 units in access point mode
