Sonic pad and cameras

I have 2 printers connected to a sonic pad. I also have 2 cameras connected, 1 for each printer. I can view either 1 camera or the other but never both, in other words I can be on printer 1 with camera 1 or on printer 2 with camera 1 and not be able to use camera 2 at all. I take it that you can have printer1/camera1 and printer2/camera2 working?

Seems you can’t without root access and some linux type programing, not risking that, I shall plug/unplug cameras as needed instead.