1992 ES300. I am in the middle of installing a second hand radio equipped with CD controls and a CD changer in the trunk. I cannot find a wiring connection for either the back of the radio (for the CD connection; I have the radio connection) and I cannot find the connection in the trunk for the CD changer. This car originally had just the radio+tape player without the CD changer. I assumed the factory wiring harness anticipated a CD add-on and would have a CD connector tucked away somewhere. Am I wrong? Are wiring harnesses radio unit specific or do they anticipate an ungrade? Help if you can before I put all of this back togther without connecting the CD components. I have already destroyed the center vent trim removing it (my instructions said to push up on taps[no doubt, now, meaning to push up on the screwdriver handle] and I have discovered instructions here that said push down, but too late)and I want to be done once and for all. Thanks.