The Sonos CONNECT has an optical output, not an optical input.
So would my suggested plan work with the connections I indicated?
What are you trying to achieve? If you want a TV surround sound system with Sonos speakers as additions to your Soundbar then you need as Sonos Home theater product.
Agreed. The term ‘sound music’ is unclear in the original post. I took it to be for music purposes only, but if the intention is surround sound, definitely not, since you’d need to use the analog input on the CONNECT with the inherent 75ms delay.
The other issue is, having no clue about what the ‘JBL’ soundbar is, how it will be ultimately connected, and what the true intent is, just music or also TV, it’s really difficult.