How can I confirm that the cellular backup connection works?

@thomas_12282724... go to keypad or your dashboard at the SS site and delete your wifi credentials.  Put your system in test.  You should get a notificiation and see in the time line test signal received.  Don't forget to reconnect to your wifi.

If you want the full test, again, disconnect your wifi credentials (or just shut down your router) arm your system to home and open any sensor that is set to instant trigger.  COPS monitoring should call you. Be prepared to have your safe word ready.