Before you proceed, you must have installed the latest version of the Connector in your Salesforce org.
Configuring the Salesforce Person Account Page Layout
To subscribe a person account to a subscriber list, you need to add a button ("Add to List") to your person account page layout. Also, in order to view the email activity data (email opens and clicks) retrieved from Campaign Monitor, you must add a related list called "Email Activities" to your person account layout.
These components are already included in the Connector package, so you only need to add them to your relevant page layout. To do that:
Adding Multiple Person Accounts to a Subscriber List