How to connect AUX to Blaupunkt RD4 N1 MPS?

Hello
My radio is Blaupunkt RD4 D2 N2.
In my Peugeot 407 sw from 2005 I wanted to connect the AUX input to be able to listen to music, e.g. from a phone or an mp3 player.
It was supposed to be fairly simple. Unfortunately, the situation was a bit too much for me.
I bought an AUX cable like in the picture:

I connected to the input on the back of the radio and wanted to activate it using the diagnostic interface. Unfortunately, when I wanted to turn on the AUX1 connector via the diagbox, only the message "bad programming" popped up, the second AUX is still set to the external mute and it cannot be changed. From the level of Peugeot, the planet did not see such an option at all.
I read a bit on the Internet and it comes out that my radio is connected to the second AUX output by a connector from the bluetooth installation.
Unfortunately, I can't see bluetooth anywhere. You can see the wires themselves.
I thought that you can connect to the wires from the AUX 2 output. I found a schematic on the internet

And here's the question - if I connect the cables from AUX 1 to AUX 2, black to pin 8, red to pin 4 and white to pin 10, will it make sense?

If there is no bt, try to connect to this active AUX, just check what you have on the mute. Sometimes diagbox also makes such tricks on me, then I do the global test again and the configuration is successful.

The point is that I connected normally to this free AUX and tried to activate it in various ways. Unfortunately, to no avail.

And what? Have you solved the problem? If so, share the solution, of course if you can, and if not, there are two of us.
Best of all, with the AUX 1 input I can do everything, set every option, but unfortunately it is occupied by bluetooth, and when I try to change any of the AUX 2, the message "wrong set-up" pops up.

Some versions of the RD4 only have 1 AUX input.

You didn't console me. The pins on the radio are supposed to be blind?

can this radio be turned on the desk