Sorry about the broken link, and I appreciate you pointing it out. Thanks for sharing your project structure—that definitely helps in troubleshooting.

Since you already tried 'ENGINE': 'custom_backend.base' and got an error, here are a few things to double-check:

• Make sure every folder in custom_backend has an __init__.py file, so Django recognizes them as proper Python packages.

• Try importing it manually with from custom_backend.base import DatabaseWrapper to see if Django can actually find it.

• Check if DatabaseWrapper is fully implemented, including attributes like client_class and methods like get_new_connection().

If you are still stuck, let me know what error you are seeing now—I will be happy to help!