Google Nest Community

I need help wiring a Nest Thermostat. I have both a blue and orange wire and the thermostat has one O/B. The photos show the current Honeywell thermostat wires and the furnace controller panel. Thanks.Zone 1 ThermostatFurnance Controller

My house has two zones. I need help in wiring a Nest Learning Thermostat to either zone. On the first floor zone, I have both an Orange and Blue wire, but the Nest has only one connection O/B. Neither zone uses the C-Wire so I am not sure if I should...