Chart Data Label Position

I have a chart and would like to position data labels at the top of my stacked bar chart for an line chart value.

On the graphs sheet of the file attached, the top graph shows value # def as a line chart but the bottom chart shows what I am trying to do, which is show the data labels and have no line for the # def legend.

I can manage that with the data labels within the bar chart and I have coloured them white.

What I would like to do is have these values outside the chart area, at the top of each stacked bar. I see you can insert a text box but I didn't know how I could assign a cell value to the text box.

Any help would be appreciated.
Thanks
Shaz