Google Nest Community

Our current set up is above. If our wiring is compatible with the gen 4 learning thermostat can somebody please tell me what color wire needs to hook up where? The black wire is the one I’m most confused about, everything else seems pretty self expla...

Can somebody pretty please help me determine if our current wiring is compatible with the gen 4 nest learning thermostat? None of it looks like it’s a multi stranded wire or high voltage. I don’t know much about what’s set up or how but I’ll do my be...