Just unplug the connector (it pulls straight out of the cluster) and do the repair work at a workbench with a good light source, and possibly a way to clamp it down. Repairing that circuit board is tedious work. Go slow and be careful! You can get brass shim stock in various thicknesses on Ebay, or since I've got the stuff in big rolls for adjusting 216 engine connecting rod bearing clearance, I'd be glad to send you some.
Jerry