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I guess you're looking for the entry to the Savant Tower to disable the bomb, right ?
The keyhole you are looking for is very small, I missed it too in the beginning. Take a look here:
http://www.volberding.com/Wizardry8/...inykeyhole.jpg
The keyhole is where the arrow points.
The animal parts and other stuff is used by the 2 rapax armorers to make CUSTOM items.