@DLane thank you!
I have confirmed the two red going to AC and 1 brown in common are coming from the rain sensor as shown in pic. Can I disregard all of these which would leave nothing in common?
The blue one going to AC as well as some of the second wires I zone are coming out of the plug shown in picture, which hasn’t been connected to anything since we bought the house.
All zones are working as expected right now.
