Running SiteMigration on target server

[marbetschar]

Unfortunately I can't expose the MySQL server on the target server to the world; but I can do so on the source server. Given this circumstances and having read the description of this plugin which states:

• You must be able to connect to the Mysql server of the Target Piwik Server.
• You must run the console command on the Piwik Server that data will be copied from.
  https://plugins.piwik.org/SiteMigration

How shall I proceed?