Such a cool show when we were kids.
I converted my power windows to manual years ago for the analog 3rd world reliability factor. I’m tempted to get this relay kit if there were ever an itch to switch back. The bigger issue for mine was the driver door master switch bank was falling apart...
You should be able to see the motor mount ground (under AC comp) directly through the right wheel well behind the fender skirt (if you still have fender skirts).