Adding a thread dimension in "thread representation"

Hi all

I use somewhat exotic thread dimensions, I enter them manually in the "toolbox" tool under the "drilling wizard" section, and this allows me to obtain the thread representations in the holes in the desired dimensions.

However, I now have to create the male part, it's a cylindrical extrusion, so we don't have to go through the wizard. As usual, I use a thread annotation->representation, except that my "exotic" dimension does not appear in the proposals.

My question is: where does the thread representation tool get its data, and how do I add it?

I hope I have been clear and I thank you in advance for your answers!

Have a nice day