This isn't something that is possible as the system will only work with one pair of surround speakers, to connect the speakers you will need to do the following:
Connect either the bass module or surround speakers to power
On the remote control, press the SoundTouch button
Press and hold 7 on the remote until the connectivity indicator on the soundbar blinks white. Once connected, the connectivity indicator on the soundbar glows white and a tone is heard from the connected speaker(s)
I hope that this helps and if you have any further questions please do reach back out to me or the community.