This is ignition switch connector housing used at least on Cadillac 1959, likely to be used on many other GM cars.
This part is normally burned on original wiring harness, and it would be almost impossible to remove wires from old burned connector housing. If you need to replace connectors, use only following connectors with correct size.
If you use old connectors, verfify that connectors are in good shape, shiny and clean. There are high currents on connections and dirty connectors are causing resistance, which is causing excessive heat.
Designed for existing cable harness and Delphi/Packard 56 series female terminals.