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My model: 2012 Civic LX Coupe
I am replacing the passenger side mirror with a normal 2012 Civic LX mirror bc it got messed up thanks to a bush. Wasn't till I put it on and googled what I got that I realized I bought one that is heated, meaning the wiring connector is completely different than the one on the car. Since we don't have the original box anymore (we bought it a few months ago), we can't return it. So, my stepdad (an engineer who has way more experience in cars and electrical wiring than I do) said if I can find a wiring diagram for the original mirror, he can determine what each wire does and swap the connector of the old mirror onto the new one and just cut the wires that control the heating function since it isn't useable on my car. I tried looking online to no avail, with most diagrams being for other years and trims and others being paywalled. If anyone has a diagram for the mirrors on my model (and possibly the diagram for the heated mirror, too), then I would greatly appreciate it.

New Mirror cable attachment next to the port its supposed to go into

Old mirror (with cable attachment shown). We want to take the attachment off this one and put it on the new one so we don't have to order a new mirror.

 
Rep Power: 224

Below is what I could find. This is for the '06, so previous gen. They are usually pretty similar but it looks like wire colors aren't matching with what you have. I'm hoping pin locations are the same but you'll have to figure that out. From this schematics pin 4 on the new mirror should go to pin 3 in the old connector, pin 5 goes to pin 2, and pin 6 goes to pin 1. Pin 1 and 3 in the new mirror are for the heater and would be discarded.

Ignore the numbers in square brackets, those are for models with turn signals in the mirror.