Call me ignorant but if it runs in the same model range ie M82 is the unit and M82H is the locking tray it means that this is the tray for the unit
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Ah, so you found the secret room, eh? Bask in the glory of a Mario Trilogy, a Pair of Zeldas and a Sextet of Megamans. Yes this is the little grey box that could and continues to do. What lies ahead is entirely up to you. YOU DECIDE