VW Gamma Radio Wiring

[TOMVW16V9N]

Hello everyone, I am in desperate need of assistance please and it would really help if someone could help. I purchased an external radio for my car and having troubles with connecting the wires. I have managed to connect the speaker wires no problem and all is well. I have also managed to connect the power cables. HOWEVER, I seem to be struggling with connecting the 'ACC' cable to the ignition connector which i am struggling to locate on my car. As i mentioned I have no problem with my brown connector cable the only trouble I am having is with my black connector and what cables I need to connect for battery to the power and ignition so then I do not have to install an external kill switch and i loose all my channels. I know its long and probably makes no sense it just feels like I have tried everything.

Any help would be so desperately appropriated. I will attach some photos below and if any further details are needed at all such as car or radio, please do let me know. (The image of the wiring diagram is obviously the old gamma radio.)