Gain access to the rear bulkhead (the metal between the trunk and the passenger compartment).
Locate the lower cutout on the center of the bulkhead (basically between the two front seats, but on the trunk side).
Identify the audio and power connectors for the CD Changer. Refer to the wiring pointed at with a red arrow in image below.
Gently pry the connectors out. You may need to apply light upward pressure on the plastic pointed at with a green arrow in image below to work the connectors out.