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Our '93 has a data link connector in that vicinity, but IIRC it only has half that many pins. The X300 DLC is a now-standard 36-way OBDII connector at the driver's side A-post. I assume your car is OBDI, but with that connector, I wonder if it could be very early OBDII?
Or else a previous owner had it wired to interface with a flux capacitor for time travel?
Ah! Last week. That's was great wasn't it? MoneyFunnel has that and a Motorola carphone modem thing under the right side of the back seat. Hmmmmmm.....