Hello fellas!

I'm the happy owner of a nice 3 door, but the former owner installed an amplifier(spelling?) in the car which I don't like.(it's not original)
So I removed it which left me with a bunch of cables I really don't know where belong.
Now I've found out all of the speakers, except the centre speaker.

I think it is this cable as seen below. Can anyone tell me yes/no?

Thanks in advance!