Everyone else readily surrenders their weapons. Harvik takes longer to do so due to hesitating and finally due to having a great deal of hardware to fork over.
"Come with me," Dar says, now carrying a heavy load of weaponry. He carries it easily, hopping from one stone spire to the next. His physique is highly impressive.
After a tedious time of navigating the rocks and waiting for your non-Jedi companions to catch up, you have reached the central rock spire! And now you can see that it has a passageway that you cannot see from the angle you approached at, hidden by a wall of rock. Dar slips into it neatly and leads you into a dark tunnel that spirals downward, inside the column.
You notice something about the tunnel walls. This was not hand-carved; it was done by machine, probably a plasma drill or something of that sort.