カスタム投稿ページだけに特定のcssやjsを読み込ませたい

function car_stock_css()  {
  if (is_single(array('car-stock'))) {
    wp_enqueue_style( 'slick_css', 'https://cdn.jsdelivr.net/npm/slick-carousel@1.8.1/slick/slick.css');
    wp_enqueue_style( 'slick_theme_css', 'https://cdn.jsdelivr.net/npm/slick-carousel@1.8.1/slick/slick-theme.css');
    }
  }
add_action( 'wp_enqueue_scripts', 'car_stock_css' );

function car_stock_js()  {
  if (is_single(array('car-stock'))) {
    wp_enqueue_script( 'ver03_js', 'https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js');
    wp_enqueue_script( 'slick_js', 'https://cdn.jsdelivr.net/npm/slick-carousel@1.9.0/slick/slick.min.js');
    wp_enqueue_script( 'car_slide', get_template_directory_uri() . '/js/car_slide.js');
    wp_enqueue_script( 'inview', get_template_directory_uri() . '/js/jquery.inview.min.js');
    }
  }
add_action( 'wp_enqueue_scripts', 'car_stock_js' );

add_action( 'init', 'create_post_type' );
function create_post_type() {
  register_post_type('car-stock', array(
    'labels' => array(
    'name' => '車テスト',
    'singular_name' => '車テスト',
  ),
    'public' => true,
    'publicly_queryable' => true,
    'show_ui' => true,
    'query_var' => true,
    'rewrite' => true,
    'capability_type' => 'post',
    'has_archive' => true,
    'hierarchical' => false,
    'menu_position' => 5,
    'supports' => array('title', 'editor', 'thumbnail'),
    'menu_icon' => 'dashicons-edit'//追記
  ));
  // 追加した箇所
  register_taxonomy('tax_car-stock',array('car-stock'), array(
    'hierarchical' => true,
    'label' => 'カテゴリー',
    'show_ui' => true,
    'public' => true
  ));
  register_taxonomy_for_object_type( 'tax_car-stock', array('car-stock') );
  // 追加した箇所
  //car-stock（ここまで）
}

//カスタム投稿（記事の表示数）
add_action('pre_get_posts', 'my_pre_get_posts');
 
function my_pre_get_posts($query) {
if (!is_admin() && $query->is_main_query() && is_post_type_archive('car-stock')) {
  $query->set('posts_per_page', 9);
  }
}

function add_post_tag_archive( $wp_query ) {
if ($wp_query->is_main_query() && $wp_query->is_tag()) {
$wp_query->set( 'post_type', array('tax_car-stock','article'));
}
}
add_action( 'pre_get_posts', 'add_post_tag_archive' , 9 , 1);