To messaging subsystem to configuration of default HQ server add something like:

<bridge name="my-bridge">
   <queue-name>jms.queue.sausage-factory</queue-name>
   <forwarding-address>jms.queue.mincing-machine</forwarding-address>
   <filter string="name='aardvark'"/>
   <transformer-class-name>
  org.hornetq.jms.example.HatColourChangeTransformer
   </transformer-class-name>
   <retry-interval>1000</retry-interval>
   <retry-interval-multiplier>1.0</retry-interval-multiplier>
   <reconnect-attempts>-1</reconnect-attempts>
   <failover-on-server-shutdown>false</failover-on-server-shutdown>
   <use-duplicate-detection>true</use-duplicate-detection>
   <confirmation-window-size>10000000</confirmation-window-size>
   <connector-ref connector-name="remote-connector" 
   backup-connector-name="backup-remote-connector"/>   
   <user>foouser</user>
   <password>foopassword</password>
</bridge>

You will need to define <remote-connector name="remote-connector" ... with outbound socket binding pointing to target HQ server (by default port 5445).

More info can be found in EAP 6 doc: Chapter 34. Core Bridges - Red Hat Customer Portal