Hi Scott,
Take a look at the attached image. You can find the redish "create map" block under Advanced > Map. The list at the top is the category names, and the list at the bottom are the values that correspond to them. The values are the ones you would replace with your variables.
Also, when using the Radar chart, be sure to adjust the "Max" property so that it makes sense for your data (you don't want a Max of 100 if all your values are around 10 - it will be a very small chart).
Hope that helps!