Subject A6 C4... request confirmation

Hello.
since I still have the problem of the flashing brake indicator lamp (the red one with exclamation mark) on the A6 C4 Bj. 97 of my dad's, here's another question. I walked through the net and also studied the BA and there are explicit statements on this topic. The A6 has only the minicheck and this lamp should have a double function. On the one hand, it monitors the level of the brake fluid and on the other, it should monitor the brake wear indicator???!!! And that's exactly what I need to confirm that's really like that. There would actually be a cable break for example. The symptoms are plausible. Because I've already got everything else. several times checked and exchanged with parts and checked. I have a question about the green 26-fold plug on the AI: Pin 11 is mass, Pin1 is the circuit for level monitoring and is non-current on the AI side and Pin 6 is the circuit for brake wear indicator and is current-impacted. Is that so correct? I'm afraid I don't have a circuit diagram from the box.