Cannot connect radio adaptor
I have a Toyota Yaris 2002 with a factory radio model 86110-52021-BO (Manufactured by Matszushita) and I am trying to connect an adaptor to be able to connect my smartphone via AUX. The problem that the adaptor I bought does not fit the plug in my radio, and I am unable to discover what is the official technical name of this plug, since I cannot even find the manual of this radio inline..
I know it is a difficult question, but maybe some of the experts here have experience with these kind of old systems..
Here are some pics of the system:
Thanks for the help :)