i dont have pics, but its simple.
you need to loosen the PAS pully on the right (as you look at it) and then lever using a crowbar until it is tighter then before (!) then do the bolts back up, (easier with two, one tensioning the other tighteing up the bolts) then check to see how tight it is. it should turn half a turn if you pinch the belt.
HTH
Rob