Syntax to pass multiple parameters for a multi-select cascading input control between dashboards?

So I have found that it is possible to pass linked parameters in Jasper Server between dashboards by embedding them in the hyperlinked URL as variables. However, I am unsure of the syntax to chain multiple together.

The method is referenced in the JasperServer User Guide Pg 45

For instance, would I do this for an image hyperlink to another dashboard?

repo:/public/TestFolder/TestDashboard?$P{"CountryName=", CountryName, ? "&"}?$P{"StateName=", StateName, "&"}?$P{"CityName=", CityName, "&"}