had a change of heart and put the wiring in the glove box for the cd changer back to as it was from the factory
put all wires back in the plug and reapplied cloth tape
pin 4 of the plug for the diag goes to the head unit then from the head unit to pin 3 of the obd port
the power and earth were there too and the green and white can bus went back to the original head unit plug
ive taken all the wires now back from the original ccr600 stereo plug and made a patch lead
last check shows all working and connection to all 3 parts with opcom
i did end up with an issue where the theft protection had been disabled and now will not except a code to enable security
so we've got ""display safe""
""radio safe""
and ""cdc safe""
altho this dont affect the system working in the background the cd changer now works
the display safe popping up every 4 seconds could get annoying......
at a guess i would say the code stored in the cdc is not replicated from the screen like the radios is
the radio clones the code from the screen or maybe its cloned the code from the cdc
got a mate coming on sat with tech2 so will see what happens from there
not sure what unit disabled means