When you install CICS, connector.jar is installed into the %JAVA_HOME%/standard/jca HFS directory (where %JAVA_HOME% is the value of the JAVADIR parameter on the DFHISTAR CICS installation job); dfjcci.jar is installed into the /usr/lpp/cicsts/cicsts31/lib directory (where cicsts31 is the value of the USSDIR parameter on the DFHISTAR installation job).