installation of aftermarket oil gauge help!!! please
 

I have a 97 mk3 golf,
and I just got a gift that was a aftermarket oil temp gauge,
Im having a bit of trouble trying to undeerstand where to connect the pieces.

What do you suggest is the easiest way to get power...the instructions talk about a module but what module are they talking about? and hooking it up to the ignition for power...is their an easy way to do this ( i dont mean really easy, but something a novice can accompolish?)

any help would be appreciated