Wiring up the engine and trying to figure out which clips go to which injector. How do I distinguish. Trying to find info in the FSM but no luck so far.

 

If the harness is all out of place, you'll need to go by wire colors.

On all FCs (S4 or S5, NA or turbo), the colors at the ECU are:
- Front primary: LG (Light Green)
- Front secondary: LG/W (Light Green/White)
- Rear primary: LG/B (Light Green/Black)
- Rear secondary: LG/R (Light Green/Red)