Help labeling wires -- forgot to take pic of previous wire set-up with old thermo

[Imhotep]

I forgot to take pics of my old thermo wiring set up. How do I identify which wire goes where?

I recently had C wires connected for power in my attic. The wires were already ran through to each of my two nest thermos, the technician just went into the attic and connected them to the unit so that power would run through them.

Now, I am in my second stint of trying to successfully set these up. A tech told me I shot the backplate on my first failed attempt. Incorrect wiring. I now know wire colors don't mean anything. Can you help make sure that I wire these new backplates correctly?

This is the wiring that each of my thermo units have to work with:

1 of 2 backplates installed (w/out wires inserted of course). The blue wire is the common wire that now has power running through it.

The following is what my HVAC tech sent me after completing the job (giving power to the C wire):

Any advice would be very much appreciated. 

[zoeuvre]

Hi Imhotep, 

Thanks for reaching out to us, and for showing interest with our Nest Learning Thermostat. 

I see that you have three zone systems on your HVAC control board. May I ask from what zone system you are trying to install the Nest Learning Thermostat?

I'll look forward to your response. 

Best,

Zoe

[Jenelyn_O]

Hi there,

Chiming in — I just want to check if you managed to see the response above. Please share with us the needed information, as it will help us to move forward.

I appreciate your help, Zoe.

Thanks,

Jenelyn

[Jenelyn_O]

Hey Imhotep,

We haven't heard from you in a while so we'll be locking this thread if there is no update within 24 hours. If you need assistance or want to discuss topics, feel free to start a new thread.

Regards,

Jenelyn