How to get operating_unit_id in move line when importing bank_statement_line with online method like Ponto?

[whulshof]

I have merged the PR to get account_operating_unit into my 16.0 server. When I try to import my bank statements, I'm getting the general error message, that all move lines should have an operating_unit_id. How do I get the operating_unit_id in the move lines? Is there a module or a config for it? Or do we just have to create a bank_statement_operating_unit module?