Google Nest Community

It’s a vaca home I gotta get back over there to try the install again

For the 4-wire I don’t see a black common wire. If none is available would I need to run one? Or can I use one of the other 4 wires

I have one more question. The thermostat above is for 1 of 3 zones. This is the basement zone. I have thermostats on 1st and 2nd flr as well. The other two thermostats only have 4-wires. RH-Red wire (with the RH/RC connector), W-White wire, Y-Yellow ...

Google Nest Thermostat - Smart Thermostat for Home - Programmable WiFi Thermostat - model GA01334

 here is a new one sorry for delay…let me know! TY!