Target for CONTINUE on custom caution notification page

Hi, newbie here apologies if this is obvious in the docs somewhere. We’re attempting to use a custom web page as the caution notification page. The docs here Configuring the Caution Notification | Zscaler indicate our custom page can allow the user to move on to whatever URL triggered the warning but it doesn’t make clear what exactly any CONTINUE button or CAPTCHA or whatever we place on the page needs to target in order to get ZScaler to acknowledge that the user has seen & acknowledged the “be real careful here” message and thus allow the target content to be displayed. Does anybody have an example of doing this we could use as a template to work from? TIA