24v line thermostat to Wyze thermostat

I have a Peco T170 thermostat multi voltage thermostat that is set to 24v. Wires used are labeled L2/Neutral, Cool Main Output, Fan Low, Fan Medium, Fan High, Red L1. This is definitely 24v (only small gauge wires). How do I use these to wire the Wyze thermostat? What is the C wire? This is only an AC thermostat - no heating.