Define CakePHP Route to call specific controller if given action not exists

Using CakePHP v3.3.16

I want to write a fallback route in such a way that if URL is not connected to any action then it should go to that fallback.

Created routes for SEO friendly URL like this

   $routes->connect(
        ':slug',
        ['prefix'=>'website','controller' => 'Brands', 'action' => 'index'],
        ['routeClass' => 'DashedRoute']
    );
    $routes->connect(
        ':slug/*',
        ['prefix'=>'website','controller' => 'Products', 'action' => 'index'],
        ['routeClass' => 'DashedRoute']
    );

But it’s also inclute all the controller actions in it so if i try to call a controller ex: cart/index it’s going to website/brands/index/index

If I have to remove exclude it, I have to create a route like this

$routes->connect('/cart',['controller' => 'Cart'], ['routeClass' => 'DashedRoute']);
And so on to the other controller to access.

Example: I have a controller CartController action addCart

CASE 1

if I access URL my_project/cart/addCart/ It should go to cart controller action

CASE 2

if I access URL my_project/abc/xyz/ and there is no controller named abc so it should go to BrandsController action index

My Current routes.php looks like this

Router::defaultRouteClass(DashedRoute::class);

Router::scope('/', function (RouteBuilder $routes) {

    $routes->connect('/', ['prefix'=>'website','controller' => 'Home', 'action' => 'index']);
    $routes->connect('/trending-brands', ['prefix'=>'website','controller' => 'Brands', 'action' => 'trending']);
    $routes->connect('/users/:action/*',['prefix'=>'website','controller' => 'Users'], ['routeClass' => 'DashedRoute']);

    $routes->connect('/cart',['prefix'=>'website','controller' => 'Cart'], ['routeClass' => 'DashedRoute']);
    $routes->connect('/cart/:action/*',['prefix'=>'website','controller' => 'Cart'], ['routeClass' => 'DashedRoute']);

    $routes->connect(
        ':slug',
        ['prefix'=>'website','controller' => 'Brands', 'action' => 'index'],
        ['routeClass' => 'DashedRoute']
    );
    $routes->connect(
        ':slug/*',
        ['prefix'=>'website','controller' => 'Products', 'action' => 'index'],
        ['routeClass' => 'DashedRoute']
    );
    $routes->connect(':controller', ['prefix'=>'website'], ['routeClass' => 'DashedRoute']);
    $routes->connect(':controller/:action/*', ['prefix'=>'website'], ['routeClass' => 'DashedRoute']);


    $routes->fallbacks(DashedRoute::class);
});

Router::prefix('website', function (RouteBuilder $routes) {
    $routes->fallbacks(DashedRoute::class);
});


Plugin::routes();