When inserting the first plug breaks off. Not like that.

Required adapter because I Zafira in a foreign (non Opel) wanted to install radio and just needed a DIN-ISO Adapter.
The antenna adapter does not fit in the mounting shank to full length just behind the radio, but hangs down. However, at the first insertion of the radio broke the plug the cable, even though he was not buckled under pressure.
On closer inspection, I asked Dan found that the cable was in turn connected only in a small part to the plug, but not the entire circumference.
Too bad, but so constructed does not hold that!