As Davey said, but if you wanted to use the cable beware the main cable is very hard but can be used as aerial cable

used it myself as it was wired to several rooms (still is) works fine but the dish is no good for terrestrial tv, but cut cable to LNB, and connect to an aerial as I did and no problems at all, most aerials will run 3+ TV's depending on signal

I run sky and use aerial as backup on the odd occasion where sky had failed, not happened in years though

The screw connections on the end of you co-ax cables are known as 'F' Connectors.

The easiest way to utilise your cables is to use a Freesat Box (as others have mentioned).

If you have a co-ax double cable in your room you can use a freesat recorder (It's twin channel and needs the double cable) like this one:

https://www.johnlewis.com/humax-hdr-1100s-smart-500gb-freesat-digital-tv-recorder/black/p2041558

If you have a single co-ax cable you can't use a twin channel box but you can use a single channel box like this one (it's not a recorder though):

https://www.johnlewis.com/humax-hb-1100s-smart-freesat-hd-digital-tv-receiver-with-built-in-wi-fi/p3202425

If your dish hasn't been moved (since you had sky then it should be plug and play. You don't subscribe, pay or register to receive any live channels.