Hello,

To display the mega inside a custom link. First add a custom link in your menu and then hit “Save Menu” button at the right corner.

After saving the menu you will see that the Custom fields [for theme] will be shown inside that custom link. Then select the “Design” as “Full Width” from the drop down then you will able to add the html block for that custom link.

Screenshot: https://jmp.sh/oI5TE5p

Best regards.