I'm generating a DataTable with a javascript data source. The data is returned from an ajax call to nodejs which queries SQL Server DB table and returns 2 columns, both numerical data. I'm adding 2 more columns to hold input fields, with default value of 0, for the user to enter numbers that will increase/decrease the values found in ColumnA/B.

$('#mytable').DataTable( {

    data: data,

    columns: [

        { data: ColumnA, defaultContent: NA },

        { data: ColumnB, defaultContent: NA },

        { data: undefined, defaultContent: '<input type=text value=0 size=10/>'},

        { data: undefined, defaultContent: '<input type=text value=0 size=10/>'}

    ]

});

This renders just fine and I can modify the text in the input field in the cell.
There is a separate input field outside the table that the user can click to 'submit changes', which calls a javascript function that will read those input fields of the table. However, I cannot figure out how to get them. Using:

var aTable = $('#mytable').DataTable();

var colAchange = atable.cell(0, 2).data();

var colBchange = atable.cell(0, 3).data();

Both colA/Bchange vars just have the 'input type=text ...' html text, not the value of the input field. This does make sense, but I cannot find the right way to read the value of the input field.
At one time I had read in the Datatables docs that you can add 'meta' data to the row data. Do I need to do that to get an id on that element and query the element by that? Otherwise how do I get that input's value?