Hi Pavan,
I think there should be option to check Where used list in Transport Connection by selecting that any of query in that those variables are used and transfer it. Also select in Grouping -> only necessary objects , Display -> List. You will see all elements of that query.
Now select any variable that is used in your query and right click on it, there may be option of "Where used list" or that window there is button of Where used list button.
Regards,
Abdullah