You can upload custom titles when you can't find a title in Holdings Management, but EBSCO will check for a managed resource or custom resource match to prevent unnecessary duplicates. The file template EBSCO provides includes their formatted columns, rather than KBART. You do not need information in every column, just make sure you maintain the column names in the same order. You also have the option of submitting a KBART file for your collection to EBSCO support so they can create custom holdings for you.