I've copied both required Jar files:

com.ibm.ws.admin.client_8.5.0.jar  com.ibm.ws.orb_8.5.0.jar

into /var/lib/jenkins/plugins/websphere-deployer/WEB-INF/lib

This is also where the other two plugin jar files were automatically put, so it seems like the correct location.

However, I can't get past this error when using the Test Connection

Stack trace

javax.servlet.ServletException: java.lang.NoClassDefFoundError: com/ibm/websphere/management/exception/AdminException at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:796) at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876) at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:249) at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53) at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746) at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876) at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:249) ....