If the tested JPLIS implementation supports a mechanism that allows instrumentation agents to be started in the VM during the live phase, then you must provide your own implementation of the underlying mechanism by extending and implementing the abstract class javasoft.sqe.jck.lib.attach.AttachConnector (see the JCK User's Guide for detailed information).
Either specify the fully-qualified name of the class as the answer to this question or choose to use javasoft.sqe.jck.lib.attach.JPLISAttachConnector class provided in the JCK to start the instrumentation agents in the running VM.