Add item to this Supply Crate (Game.ini): ConfigOverrideSupplyCrateItems=(SupplyCrateClassString="SupplyCrate_Event_CMH_C",MinItemSets=1,MaxItemSets=1,NumItemSetsPower=1.0,bSetsRandomWithoutReplacement=True,bAppendItemSets=True,bAppendPreventIncreasingMinMaxItemSets=False,ItemSets=((MinNumItems=1,MaxNumItems=1,NumItemsPower=1.0,SetWeight=1.0,bItemsRandomWithoutReplacement=True,ItemEntries=((EntryWeight=1.0,ItemClassStrings=("PrimalItemResource_Fibers_C"),ItemsWeights=(1.0),MinQuantity=10,MaxQuantity=20,MinQuality=0.0,MaxQuality=0.0,bForceBlueprint=False,ChanceToBeBlueprintOverride=0.0)))))
