none of my gauges are working.

The brass fingers I'm talking about are the contacts that you plug the VR into. Take an ohmeter and look at the pc board. You can easily see the copper leading off from the socket contacts

You have three circuit paths-----

One is ground, and by the way, the cluster MUST be grounded. I recommend you loosen/ tighten all mounting screws on the pc board, find a ground point, and put a "pigtail wire" on one, run it out behind and ground it to the column support behind the panel.

Put your meter on One brass finger contact, and trace where it goes, and check the "other end"

So one contact will lead to ground

One contact will lead to 12V coming into the pins

One contact goes to one stud on each gauge.

You cannot just LOOK at the pins and decide they are tight, use a meter and check them.