The content controls would be grouped as Graham provided in his RadioButtonsExample.docm file. Where he had two groups with CCs titled A1, A2, A3 and A4 (group 1) and B1, B2, B3 and B4 (group). The content controls are then mapped to a customXMLPart. You can using my CC Tools AddIn ("InstaMap" feature) to do that:

https://gregmaxey.com/word_tip_pages/content_control_tools.html


RadioButtons Using Document Before Store Update.docm