How do i play turntable when my era one pair is connected as surround sound?

I recently bought the era 100 set. I connected then as a surround sound set with the beam. I was watching tv then wanted to listen to my record player which has a connection to the era 100 and I couldn’t get it to pop up the line in function so I could listen to it.. is there a way to listen to the era 100 as a pair with the record player without un syncing the surround sound? Why is Sonos this janky in 2023…