I think it’s a some screws.
My rig was repainted at some point in its past… and they didn’t do the best job so I wasn’t surprised you can see the paint outline around the mirror. Hahaha. I don’t even notice it anymore. I do notice how nice and clear the mirrors are though :D
I fitted some 70 series power mirrors to my FJ62. Plugged right in and look stock! I’ll get pics later. There is the well know gap though between the base and the door. Easy to fill with a small piece of foam though.