Peugeot Speedfight 2 Oil pipe

Hello, I bought a Peugeot Speedfight 2 year 06 for my daughter today (350€, should be ok). When we drove him home about 25km, I immediately started to build him apart in the garage, as I want to check it completely and clean it. I noticed that this oil pipe (see picture) was simply loosely hanging around. https://data.motor-talk.de/…/ 60915-wa0003-3098494748970639429.jpg Is this from the carburetor? Don’t find any way to fix it. Would be nice if you could help me with that. MfG, Dirk