TCS 1398 Wire Harness – MC-1R – 2.5cm 8-pin NMRA (NEM652) to 7-pin JST Reversed Keith 4 years ago Train Control Systems 1398 MC-5″-21 Harness TCS-1398 MC-1″ R is a 1″ or 25 mm MC series harness with a 8 pin NMRA plug which is rotated 180 degrees.