Hi,
guck mal im miata.net bei den FAQ
http://www.miata.net/garage/msss.html#Technical
runtersscrollen bis ''Q) How about some pinouts? ''
''MSSS2: Bodysonic transducer plug
This is a small plug with 8 pins and a double blank. It connects to the "thumper" units in the seatbacks. It's probably the same plug and pinout in the MSSS1. ''