This A1 camera mount slides on the backside of the filament cutter arm and allows a 40mm x 40mm camera to be mounted. I used this 5MP IP camera: https://www.aliexpress.us/item/3256805562222523.html - it has Onvif so I could add it to my NVR with the rest of my security cameras. 

This mount works great to provide an up close and real-time view of what's being printed.