Problems with labeling (OpenNest)

I built a little pavillion with Rhino and Grasshopper. Then I use the PlugIn (OpenNest) to break it in individual parts. In the next step I wanted to label the individual parts like this:

But I don’t get it integrated into my code:
Endversion-Pavillion.3dm (20.0 MB) (32.2 KB)

Maybe someone also has an idea how I can add the dimensions of the individual parts in addition to the number as a label. I think I need an additional PlugIn?

Thank you very much!!