Thanks, for writing in!
As you are using Pro, you can do it through header builder.
Create a header bar before the menu bar with a background image and you can place the icon via image element or social element. Link the icon to the specific section using ID.
Suppose your section id is
section1 so the link should be
U can see you are using the classic header for your site. Please use header builder to build the header so that you can achieve the same.
Please check this for help!
Hope this helps!