Best place for config files from vendor packages

Hi,
when installing (with composer) a package, it can happen config files are provided withing the package. I can see 2 main approaches: 
1. Leaving and set the configs in their original packages
2. Moving them into main app/config directory

What ist better solution in your opinion? Especially in terms of upgrading the packages. 
I don't like changing the code in vendor packages. It is also annoying to check and migrate configs again after an upgrade of the package.
Thanks in advance for your opinion.

Option 2 all days in the week. Or your configuration would be overwritten when updating.

Option 2 all days in the week. Or your configuration would be overwritten when updating.

Thank you for your answer! It makes sense.