Thanks for posting a picture of your wiring, that always speeds up identification. With your system, your Rc wire is handling both the heat and the cooling power. We have a common wire identification chart that you can see here: https://goo.gle/3ct9L9n. You will see an explanation for all of your wires there. If you have any other questions, please let me know.
I wanted to follow up and see if you are still in need of any help. Please let me know if you are still having any trouble from here, as I would be happy to take a closer look and assist you further.
We haven't heard from you in a while so we'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the Community.