2001 audi a6 2.7t, two wire?'s w/ pic

Car is an Automatic 2001 Audi A6 2.7T Question #1. All wire diagrams I have been referring to note a 2nd starter wire that is blue. I cannot locate any blue wire coming from the column that is a starter wire when tested with a multimeter. There are 2 very light gauge light blue wires in the thicker bundle to the right in the picture that have constant +12v --- ruled out. The heavy guage wires on the left is where I found (2) 12v constant, the main starter, ACC wire, ignition wire --- just like all the diagrams. The remaining lighter guage wires are +12v constant (small red) and +12v in the ACC position (small yellow/black). Is it possible that the 2.7T does not have this mystical blue wire? Question #2. Why do all of the diagrams state the tach signal is found "at coil pack front of engine"? Every cylinder has a "coil pack" and the wiring is different than the diagram as well. Can't I just get the tach signal from any coil pack? Looks like I will have to meter a few of the wires here...

Some VW/Audis have the second starter as a thin RED / black. Some don't even have a second starter. Tach at ANY injector non-common colour or any ignitor. Test before boxing up.

Thank you Harry. I did find a good tach signal at the middle cylinder on driver side. It was a BROWN / blue wire. Looks like any BROWN / blue or green over here is good. The non-common ones as you said. I will try without a 2nd starter and post my findings. Please post anyone else if you have any other input on the phantom 2nd starter wire scenario in these cars.

second start was only on some models specifically diesel. If you cant find a second start, leave it out for now. see if the vehicle remote startsTed

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Update*** Tach signal reads about 1v at idle. If you had a remote starter that has 2 settings, set for the one that reads lower voltage. I have an Avital 4400 and had to do so to get a good tach signal. Also, system is all buttoned up and finished---looks like there is NO NEED for a second starter wire. It is working great with one. I will update if any problems arise in the next week or so starting on a cold day in March.

Tedmund as usual is right, I've only ever seen 2nd. starter in Europe on diesel VW's. Caught me by surprise, couldn't work out why the damn thing wouldn't start!Test before boxing up.