A current guess is that it’s part of the dealers key/vehicle check out/check in system. No definite winner yet.
@Urbankidx4 that's a good guess. the groove in the plastic below the circuit board does look like it slides in somewhere and the contacts complete a circuit or something
@Urbankidx4 you're definitely right. look up "electronic key management". I couldn't see the exact one, but plenty similar.
Found it!