如何使用Laravel-OracleDB？

I want to add the Laravel-OracleDB in the lumen,but I can't use the composer because my company can't use it.So I need to add the Laravel-OracleDB manually.But this is my first time to use the lumen or the laravel. This is the address of the Laravel-OracleDB: https://github.com/jfelder/Laravel-OracleDB; And this is the folder list of the lumen: