Multiple sprinkler controllers

I have a 16 zone sprinkler system. WYZE advertised that multiple controllers could be used. I have both registered and both respond except that the second one does not turn on the pump because its not connected to the Pump (C and M connection to send 24 volts to the relay) . Can I wire a jumper from the C and M output on Controller 2 to the C and M output on the #1 controller which IS connected to the Pump relay? is there a way to renumber Controller 2 zones from 1 to 11 and 2 to 12 etc? Is there anything else I need to know about using more than one controller?

I called the Support line today and I was told that only ONE controller with EIGHT ZONES can be used .

This is a trivial but ~ $100 solution …