String Concatenator not outputting single result?

Hi, I have 2 attributes that are text from a pair of text files, i want to combine them into a single attribute.

I'm using an attribute text file readers to pick out the text, then creating an attribute for each of the text_line_data ouputs and naming them initial (first file contents):

First string contents:

******************************************************************************

  THE FIRE TROUBLE CIRCUIT IS REPORTING A MALFUNCTION! 

 ******************************************************************************

3

and extended (second file contents - second file's filename is contained inside the first file, hence the extra processing):

Second file contents:

THIS INDICATES A MALFUNCTION OF THE FIRE SYSTEM

MONDAY THRU FRIDAY, 8:00 TO 4:30 PM, PLEASE NOTIFY Bob

MAINTENANCE DISPATCH AT XXX-XXXX

ALL OTHER TIMES, NOTIFY THE TELEPHONE OPERATOR.

i'm then using stringconcatenator to combine the two file's contents with a new line between:

My expected result here would be - _results looking something like:

******************************************************************************

 THE FIRE TROUBLE CIRCUIT IS REPORTING A MALFUNCTION! 

 ****************************************************************************** 3

THIS INDICATES A MALFUNCTION OF THE FIRE SYSTEM

MONDAY THRU FRIDAY, 8:00 TO 4:30 PM, PLEASE NOTIFY Bob

MAINTENANCE DISPATCH AT XXX-XXXX

ALL OTHER TIMES, NOTIFY THE TELEPHONE OPERATOR.

 but i'm getting them as separate outputs:

not sure where i am going wrong here?