Originally posted by streetlightning
mine are slightly differnt: SPR1: Grey (no label) SPR2: White/blue IAC SPR3: WHITE/green (no label) spr4: blue/white (Iac)

Is that a question? If so, you're not providing enough information; the SPR ports can be connected to anything and in any way. If you're sure they're connected to the stepper motor driver and I had to guess how, I'd say SPR4 is probably connected to JS3, while SPR3 is connected to JS2 and so forth. If that's true, your wiring scheme would look like this:

Grey = IAC yellow/blue stripe
White/blue = IAC gray
White/green = IAC gray/blue stripe
Blue/white = IAC orange