Noisy alternator/air con pump or power steering pump

[ade-5]

Alright guys as post states I have something making a lovely squeaking kind of noise! Can't seem to find out what pully is noisy! And power steering seems to have gone heavy checked all fluids and seem ok. 

 

And I need a new alternator tention bolt as I may have snapper mine lol oops 

 

Tia 

[stants]

That's prob what's squealing if it's not under enough tension