Folks, I’m suspicious that this information is not correct. Most all rain sensors including those made by Orbit are normally closed. The Orbit Bhyve also uses a normally closed sensor, hence the jumper wire on the sensor terminals. The Bhyve manual says “If the sensor is enabled and no sensor is connected (hence open circuit) then the timer will not operate. The Bhyve manual does not say that the sensor terminals are only for the wireless rain gauge.
For the original poster, just move your normally closed rain sensor over to the “Sensor” terminals (remove the jumper), check enabled the sensor by holding down the rain delay button for 5 seconds to make sure it is set to ON, and you should be good to go.