Aesro
You're right, maybe he could sense something from that call to attract him there.
Spaceport it is.
Honestly even without the Force, Aesro could notice Kavessk among the crowd. He looks like a Sith due to his dark skin and yellow eyes, but also has black robes with golden cybernetic aesthetics from his head to body. That and golden decal not tied to anything, so it would be surprising if he wasn't noticed.
But to answer your question, I can work with either or. Either Aesro noticing first, Kavessk noticing Force wise or non Force wise, everything works. I just suck at choosing decisions.