<source>
            <database host="mymagento1.com" name="magento1db" user="magento1user"
    password="mypassword"/>
            </source>
            <destination>
            <database host="localhost" name="magentodb2" user="magento2user"
password="mypassword"/>
            </destination>

<source_prefix>magento1user</source_prefix>
<dest_prefix>magento2user</dest_prefix>