Are the secondary injector plugs on the same leg of the engine harness as the injector harness ground and the O2 sensor wire or are those the primary plugs?

 

Since your profile says you have a S4 NA.

You cannot mix up secondary and primaries up.

They are totally away from each other.

I'm going off memory since I now have a TII harness.

Pretty much look at the lengths.

They are only going to be able to fit in one spot.

You can also pull out the FSM and Use a Multimeter to tone out the exact plugs.

I did that to make sure I didn't get fron and rear rotor primaries mixed up.

Pretty much the primaries are the ones closest to the ring terminal ground .

I'm pretty sure the secondaries on NA's are close to the ACV/BAC plugs.

Some one can probably chime in and correct what I said or back it up.

 

I just figured it out. the primaries are the ones on the same leg of the harness as the ring terminal ground. car runs now...wow