Is this a wire for the seat belt buzzer?

82 D150, I have this connector and wires but they don't go to anything. I'm guessing it was the seat belt buzzer? Wires are green, and white with a grey tracer. They do not show in my FSM wiring diagram that I can find.

Is my guess correct? I'm not doing the buzzer thing so if correct I intend to remove this.

TIA!

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