hi ,
Good to know the document helped you a bit.
To answer your question Please collect all the objects types ELEM
There will be many in nos. These query elements belong to the BEx Query you have just developed and captured in the Transport Connection
You can change and select the right package as shown in below screenshot. Just right click on the collected query and perform the selection.
Only after that save it in a TR
For reference, you can check the previous appropriate transports that took place to your production system. Use Tcode se01 and check the other TRs of other users just in case if you are confused about the right package.
(I always prefer to collect one query with its elements into a single TR a a time.As two queries two separate TRs. )
Here is the screenshot:
Hope it helps! 
- Aparajit