No MF2 has a green and red light on boost on right hand side of unit, and a series of red lights on left hand side for the rev position.
Ah that's inside MF2, then I have no idea, as all 3 MF2 that i have used have all had there wires through the serial port thingy.
they only MF2 I have sen with extra wires going into it is Jamies, both my car and Emma's car have Bosch 3 bar map sensors behind the fire wall with vacuum hose from T piece from the cars original map sensor.