Does anyone know how to get back to the retaining screw that holds in the ignition switch on a 1993 Oldsmobile Cutlass Supreme SL 3.1liter? I already have the steering wheel and turn signal switch off, but I can't figure out how to get around the tilt assembly. There are 2 screws that are flush with the tilt assembly that has small threads in the middle of them. Does anyone know what kind of tool is used to take out this bolts?