i know that i need to get the key item corpus invictus from the hole in the thunder plains after saving cid, and i have unlocked EVERY wall there and i cant find it!!! can someone help me please?

someone PLEASE help!

http://www.gamefaqs.com/console/ps2/game/562386.html


Thunder Plains New Cave Map (GIF) under "Maps and Charts"

woo thanks a lot!=)