You need for installation variant B:

Helmet adapter with tabs

Tilsberk head-up display

Tilsberk head-up display App

Adhesive pads for helmet adapter with tabs
For which helmets is installation variant B suitable?
Installation variant B is often used for helmets with sun visors, which have a stretchable material on the mounting surface.
Note
Before installation
For secure mounting, all adhesive surfaces must be clean, dry, and free of dust and grease. Therefore, please clean all smooth surfaces thoroughly with an alcohol-based cleaner such as spirit or rubbing alcohol before mounting. Adhesion is better on surfaces made of fabric - nevertheless, these surfaces should also be cleaned.