Add custom page to the vendor dashboard – custom menu link

add_filter( 'wcv_pro_dashboard_urls', 'custom_menu_link' );

function custom_menu_link( $pages ) {

$pages[ 'custom_link' ] = array(

        'slug' => 'http://yoursite.com/customlink/here',

        'label' => __('Custom Link', 'wcvendors-pro' ),

        'actions' => array()

);

return $pages;

}