Sounds like a dry idler pulley, maybe the fan clutch. Fan has some parts missing too, those are chips missing and not just black mucking bits ya?
Not recalling the belt layout, take em off one at a time and leave the one for the fan for last, don't run for very long w/o a fan !! Start with the PS belt, that has a sealer bearing idler puller IIRC on the bottom.
There is a gravely clicking sound along with the grinding squeel, seemd to be coming from the Alternator, that's bearing and brush noise maybe.
hillbilly stethoscope, 2-3ft long 1x2 or random stick. Place one end on the part, put your thumb over the other end and listen thru your thumb and the cartilage thing at the front of your ear opening
I prefer the stick, means I don't have to stick my head or hand near anything thats going to bite.