What do you mean by "golom"? Goblin?
*sigh* Whatever...
Yellow Chain: Central segment, goblin corpse in the first corridor
Purple Chain: North segment, Goblin leader. (plus, pull all levers in the final room)
Red Chain: East Segment, Rakshasa leader.
Green Chain: South Segment, Drow commander.
And just to be sure...
- grab them
- attach them
- touch the pool in the middle
- watch the sequence of colors over the pool
- input the sequence by pulling the colored chains
If that doesn't help, then I'm afraid nothing will.
-Zel