Hello Suprita,
not sure if I fully understood your requirement.
If you want to add a custom node in transaction SPRO you can do this with transaction S_IMG_EXTENSION. Follow this document: How to Create SPRO Node for Custom Table Customizing
If you want to know the transaction behind a node in SPRO follow this instructions:
Select the node (click on the text) -> Edit -> Display IMG Activity
The last four character of the document name are usually the transaction code.
Regards,
Dominik