Celica Forums General Discussion Interior how do I install a gauge face?

I just bought a gage face and I was wondering how easy is it to install yourself and does anyone have instructions? this is the gauge face I bought ebay [ebay.com]

An install guide for these can be found at:
https://celicahobby.com/forums/ubbt...verse-indiglo-overlays-installation.html

hey , I just looked at the instructions on that page but I would just like to wire it into the green and black wire in the back of the gauge cluster, here is a pic of my gauge, my main question is where do I ground the black wire without having to buy any wire

Any of the Celica's metal body-structure points can be used as a grounding point