Help with C wire for Wyze thermostat

This is the control board on our furnace/ac unit. Any ideas on how to connect a C wire using the adapter provided with the Wyze thermostat? Or, we have extra unused wires in our present thermostat, do we connect one of those to the transformer?

Get a wire with a female spade connector on it and connect it to the terminal labeled C. Connect the other end to an unused wire in your thermostat run. Find the same colored wire behind your thermostat and connect it to the C terminal on the Wyze.

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I’m not seeing your thermostat wire bundle usually white or brown jacket with 3 to 6 wires. 2 wire cable is to the contactor for the AC Compressor.