Add ReCaptcha to SmartCapture Form in Cloud Pages

We are trying to implement Google Recaptcha v2 into our Smart Capture form within a Cloud Page. Here's what we've done so far:

1. Created a Data Extension
2. Created Cloud Pages Collection
3. Added Cloud Pages Landing Page to the Collection
4. Included a Smart Capture form associated with Data Extension within Landing Page
5. Included Form Page snippets per AmpScript XYZ: https://ampscript.xyz/how-tos/how-to-implement-google-recaptcha-on-marketing-cloud-forms/

The front end seems to be working correctly. However, it's not clear where/how we can enter the AmpScript or ss js into the form handler. Is there any way to edit the form handler per the Form Handler Page instructions on AmpScript XYZ?