Looks like it should be at the same level as sampleapp and standalone. Like sampleapp and standalone (and unlike ksb/client-impl and ksb/server-impl) it has its own configuration location. The spring bean configuration is largely like Standalones, without the beans from org/kuali/rice/config/RiceSpringBeans.xml except, of course the <bean id="ksbConfigurer" class="org.kuali.rice.ksb.messaging.config.KSBConfigurer"/> . Also bitronix is not available as is, but I think we can reuse <import resource="classpath:org/kuali/rice/core/RiceJTASpringBeans.xml"/> and <import resource="classpath:org/kuali/rice/core/RiceDataSourceSpringBeans.xml"/> from StandaloneSpringBeans.xml.
How does "servicebus" strike you as the directory name? It's another "s" so it will be close to sampleapp and standalone.