Hello,
I just created a DIY for this topic, it's in Romanian, I can translate it to English if needed, but I can't translate it in French:
http://www.peugeotclubromania.ro/forum/threads/35457-How-To-Montare-senzor-de-ploaie-lumina-original-Peugeot-206-MUX-(faruri-automate-stergatoare-automate)
Let me know if I can provide further help.