Adding buttons to nav bar after search bar

I still need an answer on how to put a call to action button (login)logout at the end of the nav bar AFTER the search bar. It needs to be apart from the nav bar. I found this: add_filter(‘wp_nav_menu_items’, ‘add_login_logout_link’, 10, 2);

function add_login_logout_link($items, $args) {

ob_start();

wp_loginout(‘index.php’);

$loginoutlink = ob_get_contents();

ob_end_clean();

if( $args->theme_location == ‘sub-menu’ ) {

$items .= ‘

‘. $loginoutlink .’

‘;

}

return $items;

}

but I need to know what the menu is. I am using the small fixed header, I have tried everything I could see in replacement of sub-menu, so . is this code right? and 2. if it’s not right I need the proper code for this,