Thanks for reaching out, hope I can clear this up for you.
You can use an ethernet connection to connect your Soundbar 700 or 500 to your network. As for adding accessories, you can do a cabled connection between your Soundbar and bass module, do note there is only room for 1 bass module cabled connection. Regrettably at this time we do not have a cabled outlet for our rear speakers, but by connecting your Soundbar with an ethernet cable you're able to connect this wirelessly.
I hope this helps.
It's unlikely, DurinVIII.
Please note the Soundbar 700 and Soundbar 500 do not feature physical ports to allow for audio to be transmitted via a cabled connection.