There are two options how the URL of replicated site should look like. You can choose default or custom location.
This is the default value and requires no further set up. Only thing you need is to choose a name for the replicated site which will appear in the link.
If you want other URL or you want the replicated site to be located on another server you can choose this option. In this case you will be able to specify full url to the replicated site. This url must point to the Apache web server that supports mod_rewrite and mod_proxy.
After you select the desired URL, click Generate .htaccess for this location. You will get a dialog with the corresponding .htaccess code and location where you have to use (place) this code. After it is uploaded, you can verify if it is working by clicking the Check if it is working button.