Wix

Tag Installation

Wix now allows GTM to be installed.
https://support.wix.com/en/article/adding-your-google-tag-manager-account-id-to-your-wix-site

1. Go to your site's Marketing Integrations tab.
2. Go to Google Tag Manager and click Go For It.
3. At the top right click Connect Google Tag Manager.
4. Enter your Google Tag Manager container ID.
5. Click Save.

The contact form in Wix will use the event "lead"