Need help w/ Tach install!!!!!!

[I_love_my_MX-3]

I got a Sunoco Tach and shiftlight the other day and I have no Idea how to wire it up. Theres 4 wires in the back; black (ground), Red (power), Green (????), and white (????). And then in the back of the shift light theres a double wire in the back, both are black. Any help would be appreciated. Also I cant find where to connect my speedo cable to the car. <p>Thanks,
-Alex