@Springfield I would guess based on what is written on this screenshot you need to enter (in the last box) this:
192.168.0.46:554/live0
You need to change the IP to whatever your app gives you, above is an example. 554 is RTSP port.
For additional cameras the “live0” bit changes, increment the digit.
In my experience the live test does not work as the cameras only send data when triggered, just add it and see