Belt squealing whenever in low rpms or first start up?

[Nissan240Sound]

My car squeals real nice when i start it up or when i slow down to stop at a stop light. I think my belt is loose. How do i tighten it i've looked a lot of places to see how to do it but i cant find anything. Thanks

[96_S14_SE]

The three belts can be tightened from the PS / Alt / and idler. There will be a retaining bolt on the face (towards the front) of the bracket for each and in the center of the idler pully (lower single pully sitting alone between crank and ac). They are all 14's iirc, so loosen those first, on whatever belt is loose. Then to the left of the alt, right of the power steering, and bottom of the of the idler, are tension bolts, also 14's. Tighten these to tighten the belt that is loose.

Should be it. Just dont over tighten, and remember to retighten the retaining bolt (for lack of a better word right now) so the belt doesnt come loose again.