Use JCL Override Library

Allows the task to work with a JCL override library on the target system. If this option is selected, the Agent will check the JCL override path (specified in JCL Override Location) before submitting the job from JCL Location.
 
If a JCL member is found at the override path, the job is submitted from there. Otherwise, the Agent will look to the JCL Location path for submission.
 
The task instance will display the actual path that was used for job submission in Submitted JCL Location.