1. In Formatting Property click on Value Axis Property.

2. The Value Axis label function controls the value labels, it stays true by default.

3. Enter following details in Value Labels:
Toggle Label inside

Label Distance: Controls the distance between the labels in chart, user can put positive and negative values in it as per requirements.

Label Inside: It displays the label position inside the chart, by default it is outside the chart.

4. Click on Preview and Save and Exit.

5. Now, match your Radar chart with the below example, it should look like the figure below: