Rapidly obtaining the PARMLIB and the E2ELOGMBR member defined to a specific C1DEFLTS table (when you have many to look through) can be performed by executing a REXX within Endevor that issues an API CALL to ENHALSIT (SITE), obtain the information and browse the library where the Event Logging directory is defined.
Attached is a rexx that can be copied into the CSI1CLS0 library concatenated in the ISPF Address space and allocated by Endevor.
It only runs while in Endevor.