My Pantera, chassis 6018 (built July 1973), is technically a 1974 Pantera. It is equipped with this device. Its a seat belt interlock, preventing the car from starting if the driver and passenger are not wearing the seatbelts.
American cars beginning with 1972 models (assembled after July 1, 1971) had strange safety and emissions equipment like these interlocks. The device in 6018 is bypassed (wire 9 landed on wire 8 terminal). I don't think about it. I have not worried about the interlock or fuses 9, 11, and 12 ... I just hope no problems arise in that area. If your Pantera is not equipped with this circuit you are lucky.
-G
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