To make chests appear on your map, you need to get the “Map Upgrade: Chests” which is an upgrade for your Holomap.
You’ll find it at the end of the Phon’Qi Caverns which you can access from the Foothill Falls region of Koboh. You need to have the Force Lift skill and the ability to go through green barriers!
Pull the trap door off one of the shacks and then enter it. You will find a droid companion here, too! But for now, just shimmy through the gap in the wall to enter the Phon’Qi Caverns.
You will notice that there are 3 paths as soon as you enter. Take the middle path that has a huge metallic object in it. Lift the object to reveal a hole, then drop down the hole.
You will land on a bridge, which will sadly break apart. However, you can cross the gap by either using the Air Dash or the nearby Grapple Point.
On the other side of the bridge, you will find a room with a rocky formation in the ceiling. Pull it down to create another hole, then jump in.
Look for a dark exit that has a signpost, then follow the path down until you reach a climbable wall. Droids will attack you. Climb the wall once you’ve taken care of them.
Once you’re up, go through the lit path and keep going forward until you see a room with green light. Go into the room to the right, the one without the green light.
Climb the wall to get up the ledge and reach the other side, then follow the path until you reach a metallic floor. It’s a trap, but you have to deal with it so just step on it and let it take you down.
Climb up the wall in this room and go through the green barrier. Pull the orange bomb creatures on the walls and throw them against the purple walls.
You will find a door with a terminal after the third purple wall. Let BD-1 do his magic and he’ll have it open in no time. However, a boss enemy will interrupt him!
Once the boss is down, have BD-1 open the door and then go into the room. Look for the metallic sheet on the wall on the left and climb up.