Set Default receive connector exchange 2010

Hi All

We have three exchange servers setup presently, one mailbox and two CAS/Hub transport.

Each hub transport server has a receive connector setup.  How do I change the defaut server for the receive connector for mails sent internally to each other?  Presently it is using the EXCH.client.local but I would like to change it to the other server CAS01.client.local

Running Exchange 2010.

[PS] C:\Windows\system32>Get-ReceiveConnector

Identity                                Bindings                                Enabled
--------                                --------                                -------
EXCH\Client EXCH           {:::587, 0.0.0.0:587}                   True
EXCH \Default EXCH           {:::25, 0.0.0.0:25}                     True
EXCH \Printer Connection           {172.16.1.10:25}                        True
CAS01\Default CAS01           {:::25, 0.0.0.0:25}                     True
CAS01\Client CAS01            {:::587, 0.0.0.0:587}                   True
CAS01\Printer Connection           {192.168.1.14:25}                       True

Thanks

Brian