Where did you source your heated mirror glass from?I just swapped the glass, ran my own wire thru the door boot up to the mirror glass, and connected it to the defroster feed.
see my original thread.
Defogger wire location
Just posting for reference in case it might help someone else. I located the rear glass defogger on my big horn. It’s a high current relay output. I tapped it to provide power to the heated glass I’m putting into my big horn non heated tow mirrors. You take up the driver sill plate, pull up...5thgenrams.com