PHP specific page add menu

Hi,

I can’t figure out the PHP to add the mega Menu on a specific page only.
Let’s say the page is named “Test”, what is the correct PHP to add to the functions.php file? I’d also prefer to have the menu at the top of the main content, if possible.

default php;
<?php wp_nav_menu( array( ‘theme_location’ => ‘main’ ) ); ?>

Thanks in advance,

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