Adding a secondary logo on the right hand side of header

Hi there,

Please kindly help I am designing a company website and the client wants two logos, one on the left hand side, and one on the right hand side. How do I upload an image to the right hand side? What should I change on the CSS?

The theme I am using is https://themeforest.net/item/the-agency-v2-wordpress-theme-for-agencies/full_screen_preview/8275215

I would like it to look similar to the header of this page https://www.bizcommunity.com/PressOffice/PowerhouseAdvertising

Please kindly help. It would be really appreciated.

Thank you so much