Here's some photos of my speaker install. First are of the factory setup.
Front right side with door cover panel removed.
First, remove wire from under the retainer clip.
Push in on the locking tab and pull the connector up and away from the speaker.
Note the shape of the electrical connector. Also note the use of foam where the speaker meets both the door and the cover panel.
With the wiring disconnected grab the entire speaker assembly and rotate counter-clockwise to remove from the door.