25D Feature - Create Journey Task Instructions Using Generative AI - VBS Page Name?

I am working on enabling the new 25D feature "Create Journey Task Instructions Using Generative AI." As per the documentation, to display the Generate button, I need to enable the Show AI Assist VB constant by setting its value to true in Visual Builder Studio (VBS) on the page where the task panel drawer is present.

However, I am unable to identify the exact page name or path in VBS that I need to edit to enable this constant. Could you please provide the specific page name or navigation steps within VBS where this configuration should be made?

Thank you for your assistance.