learndash-quiz-essay-upload-link

 <?php
/**
 * Example usage for learndash-quiz-essay-upload-link filter.
 */
add_filter(
	'learndash-quiz-essay-upload-link',
	function( $upload_link ) {
		// May add any custom logic using $upload_link.

		// Always return $upload_link.
		return $upload_link;
	}
);