SMC (Sally) 113-117-121 and 129-131 now combine and divide automatically based on the position of the folding walls. A change in the wall position (open/closed) will trigger a message on the touchpanel when rooms are combined. If rooms are combined, it will ask you to choose which lectern from which you'd like to operate. When rooms are divided, no action is needed as the system reconfigures itself.
Here is a video walkthrough of the updated systems (January 2024): https://youtu.be/GWzd5crdWaI