Schema Import or Creation

I went through all of the training, but no where does it tell you how to import a schema.  It was always already available.  I have a CSV file in S3 and am reading, then csv parser, then mapper.  The mapper is where I am having problems. 

I manually added column names. ($Account_Id, etc.) and I can't get the output from the csv parser to line up with the table.  How do you sync them?