Astra G 2002 CDc 3 Upgrade

[davp]

Hi1 wonder if any one can help ? I am upgrading My stereo cassette player vaux/ phillips 400 unit to a 600 with cd controls and fitting a 4 disc Phillips CDC 3 changer in the glove box 600 head unit installed and working with all connections and place but they go into car wiring harness and I cannot find the plug to connect the 4 disc changer - Can anyone help?? Dave