MatriX racing Tachometer will it work?

My friend is selling me a brand new type X Tach for my 2001 gs eclipse techtronic transmission. I need to know if i can even hook it up to it? it has a wire for grounding, illuminatrion. power, and the actualy tach (green) but where do i put teh green wire? if it even works please reply quick, this is a good deal its for only 50$ and it retails at 200

There is a tachometer in your gauge cluster already. Use it.

And it's "tiptronic", not techtronic.