BI 7.0 Web Template IVIew 'System' Property

While creating a Web template IView for BI 7.0 Template, the IVew wizard does not ask for which System Alias you need to connect to, as in BI 3.x IViews. I assume it connects to a default system.

If the portal has multiple System Aliases (BI Systems) conencted to, and you want to connect to a specific system, how to speciy this.

Thanks