Dome light? The harness is still in place.Plastic Map light bulb socket.
That’s the first thing I tried 2889561 69281For starters we need to know the wire colors. There's a tag, can you read the number? Plug that into a search engine.
White and black. It must be for the rear blower being 4 foot long. I don't see how a radio harness would be that long.Green and Black?, it's the speaker wire.