Integration Services :: SSIS Foreach Loop Container Passing Variables To Store Procedure

I am having a challenge to pass the filename variable from SSIS Foreach Loop Container to SQL store procedure.  I have an "Execute SQL Task" inside "Foreach Loop Container" which will receive the input filename parameter passed by the Foreach Loop Container.  The store procedure command line is defined as "EXEC sp_mySQLStoreProcedure  ?" within the "Execute SQL Task".  The Foreach loop container will gather the filenames from File System then put it in the filename variable one by one.  I would like to pass the filename variable as the input parameter to the sp_mySQLStoreProcedure in the "Execute SQL Task".  How can I connect the variable and the store procedure so that it will process all the input files gathered by the Foreach Loop Container?