Update: vanagon mailing list guesses include prop to keep loose vent window open and holding notes to metal dash. Good guesses and would work, but not the primary intent.
Good friend Stephen gave me this idea. Handy bit of wood with magnet on one end. It’s 1 1/2″ long, 3/4″ diameter. It could be another 3/4″ longer but works fine as is. Extra points if you can guess the wood (I’m looking at you, oldfussbudget). Wood hint, it’s never going to rot.
Oh and yes, can have more than one use, with that magnet and all.