Power Steering Pump. 4 Bolts, all 13mm. 1 Adjuster 13mm
1 Front Top Center (Pivot Point)
1 Front Bottom Center (Locks adjusting bolt)
2 Rear (In slots, have to be loose for pump to pivot) (lower one is a little tough to get at, but doable with normal 13mm wrench)
Adjustment is 13mm bolt head facing Driver Side.
Loosen all 4 13mm bolts
Turn Adjustment Counter Clockwise to tighten.
Might want to go ahead and put a new belt on too if you haven't already.