You put in the codes? A new mission will appear on earth. It's the same location as cayde's stash. You start at the broken bridge and you have to speed run to the top. You have 4 minutes. Just sprint past everything and then you'll go up the grav lift. Once in that room, open the chest in there and killed the 3 wizards that spawn and you'll get an exotic fusion core that will go into your inventory.