Sigênik suggested he would test your attention to details, and that you should pay attention when meeting the elders. It appears he was truthful. He means to test you.
'The test is simple. Alas, it is not something we should discuss in the open. When you are prepared, return to me so we may find a place more conducive to discussions such as ours.'
Sigênik wishes to ascertain if you paid attention and learned the identity of the elder who is allied with the Rebels in Khûd Zagin. He does not wish to speak within the outpost and suggests you discuss elsewhere.
You satisfied Sigênik's concerns and correctly identified the elder allied to the rebellion. After returning to Jírush you should speak with Sigênik to learn what is next.