Presumably you mean this turntable.

Sonos doesn’t provide any direct Bluetooth output, anywhere. If you wanted Bluetooth through the Sonos system you’d need to get a Port and wire it to a Bluetooth transmitter. Pricey.

Looking at the turntable, however, there appear to be L/R RCA outputs which one would assume are at line level. These should be able to connect to a Bluetooth transmitter directly. 

Yes. I was wondering if that would be the easiest way. 
they are for wired speakers 

Yes, those RCAs would be for active speakers (i.e. with built-in amplification), and could also feed an analog amplifier. In that case they’d be fine with a Bluetooth transmitter.