2000 jetta tach adapter

does this car need the auto meter tach adapter? what wire do I hook the signel lead from the auto meter tach to?
(pre flame defence) yes the car has a fatory tach, No the view obstucting
Tach will not add POWER to the car, Yes I am willing to put holes in the dash. I have wasted so much money on the stupid tach, that I dont want to spend more money for the tach addapter!
Just asking a simple question, but if you feel the need to flame, then go ahead, I can handle it.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.