When viewing the Platform Integrations (under the company menu), you will select on ACT! CRM to link up.
Enter in the API Endpoint (e.g. https://acti.yourwebsite.com/acti.web.api), the database name along with a username and password for a PeopleVine API user.
Once you've added the connection, you will be able to sync specific data from ACT to PeopleVine based on a modified date time frame.