To play it to other sonos speakers in other rooms it’d have to be to pass it over your Wi-Fi. Within the amp I’m not sure tbh and I’m not even sure that it’s be possible to figure out. It is an alaogue line in port that you’d be connecting the tt to. (edit: what
@kvetcha says above makes a lot of sense).
If you get that it might also be an idea to use it as your tv speaker. That amp gets great reviews as a television speaker and has a HDMI arc input/output to connect to the HDMI arc input/output on your tele. In line with the rest of sonos it has so so music reviews but again they aren’t bad and you do get the form factor and convenience.
That said I’d put money on a reconditioned NAD 316, and you could add a sonos port to it for similar money to the sonos amp, absolutely smoking it.