si cluster in dx problem?
 

hey guys, i have a problem with a si cluster i picked up from a wrecker
my old dx cluter has no tach on it but the si one does have one
so my main problem is that the si cluster has 2 main plugs on the sides and 1 yellow plug in the center and 1 green plug in the center, what is that plug for because has dx harness doesn;t have one
what is this green plug for?
i need help
thanks