Hi @Edmac786, your KLH Twenty Four really vintage! I think you want to play the output of the turntable through your Sonos system? You’ll need a line-level output to do that, which might be the Record jacks. If those are indeed line-level (I can’t find more information online) you can use any Sonos device with line-level inputs, including a Connect or Port.
By chance, do you have a Sonos speaker with line-level inputs? If yes it would save you the expense of purchasing a Connect or Port. Which would be good, as this experiment may not work.