1. Log in to your Merchant Center and navigate to the "Settings" tab
2. Click "Email" on the left-hand menu
3. Click "Add a new email "
4. Enter the email address and password
5. Decide whether you would like the contacts to be added automatically, or whether you would prefer to be prompted to add them yourself when new contacts are detected
6. Click the purple "Add Email" button to finish
To edit the email address connected to your account, click Edit next to the existing email address and type in the new email address you would like to pull contacts from.
To delete the email address connected to your account, click Disconnect next to the existing email address.