I bought a tach for my 98 cavalier, the thing is i don't have the wiring diagram... Ány ideas?

I bought a tach off my friend and put it on my 98 cavalier. It all depends on the brand that you bought. E- mail me with the info and ill hook it up bro. Just so you know it wont run high on the gauge. Mine red lined at 4000. But it does held shifting. dexter12@cox.net