The one on top is for the A/c. theres 2 on the bottom.. its the one with 2 wires. You can get at it with a 17inch line wrench or the open end of a normal wrench...Dont use the box end of a normal wrench... it may round it off.

11.45@125,
stock bottom end 6bolt 2g head.
272 hks cams.
Holset hx35
Backyard biult!!