-
I'm confused, as I have no idea why the speaker is wired for four inputs while the speaker looks like that.
Do you have access to a wiring diagram for the stereo, as I'd be wary of altering the wiring without knowing what the signals are from the head unit or amp.
Do any of the aftermarket car speaker makers have a speaker to go in there. That way you can see if other models have speakers like that.
What does the original speaker look like on the other side.