RDS 2012 CB HA change SQL Istance port

Hi all

I have a clusterd instance for HA connection Broker on a different port than 1433. My port is 1438. How can i specify in the string connection the different port? It's Possible?

Can do somelike this?

DRIVER=SQL Server Native Client 11.0;SERVER=SqlName:1438;Trusted_Connection=Yes;APP=Remote Desktop Services Connection Broker;DATABASE=SQL12GP

Thanks!