I don't think we can find their wallet. If everyone knows whale wallet then we can know when they will sell their coin. Just 1 transaction deposit to exchange then the whole market will go down.
You won't find his wallet because it's most likely not a single one. Corporate investors aren't like us little people. They don't hold millions of dollars on their laptops, although there are some pretty neat air gapped laptops. Unless Elon decides to disclose all the info (which he won't because he will not want the whole world to know when he decides to sell) you won't find his addresses.