Astra J Replacing the CD400 radio with Navi950 Europe

This time I replaced the radio in Opel Astra J.
My car had a basic radio model, CD400, and I decided to replace it with the highest factory model, Navi 950 Europe. Such an exchange involves modifying the radio installation in the car. After installing Navi950, we gain, among others - a large color display, BT for music and calls, a navigation system, the ability to connect a reversing camera and, most importantly, in terms of audio, this radio is much, much better than the CD400.