Thanks for reaching out to the community. Sure, you can plug in a SoundTouch Wireless link adapter in the back of your system using the AUX or Stereo RCA input. This will allow you to stream from your Bluetooth devices. Here's a link for more information: https://bose.life/2HcB47w
This is what's inside the box if you needed to know that too:
SoundTouch Wireless Link adapter
Optical to mini-optical cable
3.5 mm stereo cable
3.5 mm female to RCA cable
Hope that helps! Let us know if there is anything you need.