I'm trying to get the Namingway-quest done and I'm stuck on the pudding-part. I understand that I should have the Treasure Hunter-augment for it. There's only one little problem. I can't fill Sylp Cave B3's map 100%. I once did it, but I don't remember how. I've tried all kinds of routes to reach it, but all in vain. The most upper area with a line of empty chests has one part I can't reach. Can anyone tell me how to get there and complete the map?