Emergency Stop & Air Purifier

I have the Snapmaker 2.0 A350 along with the Enclosure, and the air purifier. I recently purchased the Rotary Module with the Emergency Stop Button. My question is how to connect the Stop button. The instructions tell me to plug it into the same slot that the air purifier is plugged into. There still seems to be two open slots on the current Hub. Does anyone have a similar setup with all these modules?

There’s a new extension hub that you need when using that many attachments:

-S

If you have AUXilary ports available, just plug it into any one of them. I plugged mine into an extra plug on the enclosure.