Thank you for posting in the Bose Community.
You can connect the bass module using the remote control. Simultaneously press and hold the Bluetooth and Play/Pause buttons for about five seconds: The soundbar light bar pulses white while connecting, then stops once connected. Additionally, you can connect the bass module using an interconnect cable (3.5mm Male to 3.5mm Male - Shielded).
Let me know if you have any further questions.
Charlotte G - Community Support