Mega Main Menu integration

How to import Mega Main Menu file? The file is megamenu.txt.

I try with this code but did not work

array(
'import_file_name' => 'Home 1',
'categories' => array( 'Magazine' ),
'local_import_megamenu_file' => trailingslashit( get_template_directory() ) . '/inc/installation/megamenu.txt', // Add this line
'local_import_redux' => array(
array(
'file_path' => trailingslashit( get_template_directory() ) . '/inc/installation/option-boxed.json',
'option_name' => 'redux_tribunalex',
),
),
'import_preview_image_url' => get_stylesheet_directory_uri() . '/inc/boxed1.jpg',
'import_notice' => __( 'After import demo data, you will need to:
1. Import Menu Navigation setup separately.
2. Import Mega Menu setting.', 'tribunalex' ),
'preview_url' => 'https://fffff.com/',
),

Thank you