It is possible to purchase them with some specifics in the Aux connector but these are the standards
Non vanos, vanos, M42 :
http://www.vems.hu/files/M50Turbo/scn011.pdf
S50B32 :
http://www.vems.hu/files/M50Turbo/scn010.pdf
M52 :
Pin Function
1 5V
2 Analog ch1
3 Analog ch2
4 Analog ch3
5 2nd Wheelspeed
6 Stepper A
7 Stepper B
8 Stepper C
9 Stepper D
10 GND