Mustang Ii Interior Problem.

I don't have one either (have the console) but my Haynes manual says it snaps on. From the picture it looks like you'd reach a hand under the back part of the cover and pull out and up (there looks to be a tab molded into the cover which snaps under the metal bracket, you're trying to pry that away to clear the bracket, I imagine pushing back on the whole cover at the same time would help). Rotate forward and remove from the lever. It looks good on paper but definitely be careful, those old parts are sometimes pretty fragile.