Where is the tach on a 68 dart?

The reason I was asking this question, is because I looked at a GTS that listed a tach on the fender tag. Well, I bought the car, and would really like to find out more about this. There is no sign of a tach, or even a place where one may have been mounted on the console.

Does anyone have a picture of a factory tach setup in a 68 GTS?