You will also need
1) To have a schema with the 10 fields that is defined as a Flat File Schema (Add new Item, Flat File Schema), in which you define child delimiter on the root with Child Delimiter Type Hexadecimal and the Child Delimiter as 0x0D 0x0A (Carriage Return, Line Feed). Then on the record you must set the Child Delimiter Type Character and the Child Delimiter as , (comma). You may also want to set the Wrap Character to " on the fields if you expect any commas in your data.
2) You need to add a Send Pipeline with (Add New Item, Send Pipeline), in which you need to put the Flat file assembler in the Assemble stage and where the Document Schema points at the schema from 1 above.
3) You need to update you map that maps to two inputs to use the schema above.
4) You need to select the pipeline from 2 in your send port.
For the correlation you will usually set it to a promoted property of something in the message, as you haven't defined are what the criteria for matching the two files are I can't be more specific. Examples include a date in the file (e.g. you want to match two files with the same date). Try it without correlation first and get that working, you can add correlation later.