Following that guide
I choose to configure migration in a separate module as recommended.
But when run
bin/magento migrate:settings -r app/code/Bileamara/Migration/etc/opensource-to-opensource/18.104.22.168/config.xml
I got the following error:
Invalid map filename: /mnt/vdb/vhosts/example.com/subdomains/dev/vendor/magento/data-migration-tool/etc/opensource-to-opensource/settings.xml
but what is expected is that the script looking for files first in custom module than in vendor folder.