Pro Forms - Submit which radio button is selected

How To
1

Hello.
I have a contact form with two radio fields in a radio wrapper, But I can’t figure out how to send the selected radio field with the email. In the email I see the labels of the fields but not which one was selected.
Can someone tell me what to do? Do I have to add some special code?
All the text fields get submitted and if I change the radio fields to a select field I also get the value.

Thanks,
Sven

Bricksforge 2.0.3, Bricks 1.9.3