auxiliary belt

Howdy give mind Ph2 ‘02 172 has what look like new belts and is driving very well. No documented service history until I got my hands on it. No idea if the previous owner or the one before did this, but the alternator top bolt is missing so the alternator is sitting on the metal a/c pipe and...

Since yesterday I noticed a squeak kind of noise while driving,only does this while driving & not on idle. Sounds like a rubbing kind of noise ie the aux belt loose. The belt has been on a year & no problems so far after fitting until now. Ive found the area where it's coming from & have tried...