I found a way to pair these sensors without security. Add the sensor via a secondary controller stick and PC Controller software. Use the NWI (Network Wide Inclusion) button in PC Controller to add to the network.
Hopefully Hubitat (@bcopeland) will add a native way to control the security level for adding these kinds of devices that do not have a hardware way of controlling security level when pairing.
The sensors seem to now be working as they did on a C4. Using these sensors in S0 made them work horribly and chewed up batteries.
