Welcome to the community! Thanks for being a loyal Bose fan.
I am sorry, at this time you are unable to pair the two. However, with the introduction of Bose SimpleSync, you are able to pair a member of the Bose Home Speaker family with select Bose portable Bluetooth speakers or Bose Noise Cancelling Headphones 700. So if you have any of these, you can connect the two.
In the meantime, I will raise a feature request with the development team to pair the SoundSport Free with the Soundbar 700.