Add extra menu with same style as main menu for the theme Pinboard 1.1.0]

Im fairly new to WordPress, have mercy on me 😉

Im using “Custom Menu Wizard” widget with Shortcode to add a extra menu inside the page content, this worked fine, I can insert a “new menu” inside a specific page.
But now im trying for this “new” menu to have the same css class as the theme’s main menu, to make it look the same.
I figured out that the class of the main menu is #access inside style.css.
The widget Custom Menu Wizard has an option to assign a Class to the extra menu you are creating, but this isnt working, I assign the class access (same as the main menu) but it wont apply, no changes are visible on the “new menu”.

Maybe im approaching this the wrong way, any advice on How to apply an existing Class to a new item?

Thank you.