You can now send new customer data (emails, name) to Mailchimp.
On the main menu of the Mango plugin, select the integrations tab and click to add a new integration.
Then select the "Integration Type" for Mailchimp.
Simply add your integration details as shown below.
The integration ID is a short identifier (self-created), so you can differentiate it from other Mailchimp integrations you might add later on.
You can get the API Key and List ID directly from your Mailchimp account.