Hi Deric4484,
Thanks for posting here in the Google Nest community. Let’s check this out. This can be wired on the Nest Thermostat, and for the blue wire, you can connect it to the OB/* terminal if you’re planning to get the Nest Learning Thermostat, and the OB terminal if you’re planning to get the Nest Thermostat 2020.
Let me know if you have other questions or concerns.
Best,
Renz
