I'm about to change the fluid in my 1973 Chevy 3/4 ton truck with the "14 bolt" rear end. I bought a new chrome cover for it, I've seen them come with magnets on them but mine doesn't have one. I'd like to attach a small magnet somehow. Any ideas how to attach the magnet to the cover? Obviously it will stick on it's own, but is that enough to hold it? Maybe some kind of epoxy to glue it down? I wouldn't want the magnet getting loose and into my gears...