Hello @ccapps24
Thank you for reaching out to our Nest community about this compatibility situation. I'm happy to help you with it.
I really appreciate the image you shared with us. Unfortunately, it is difficult to find an answer for this wiring configuration. To avoid making any mistakes and to be 100% sure about this compatibility, I recommend you contact a Nest Pro to check if your system can work with our smart thermostats.
You can enter here to find a Nest Pro.
Please feel free to continue posting information about your device; we're here to help.
Best regards,
Douglas.
