generate route for routes defined inside group

I have this route defined inside a group

Route::group(['domain' => '{subdomain}.test.com'], function () {

    Route::get('/models/{id?}', [
        'as' => 'car-model',
        'uses' => 'CarModelController@details'
    ]);

});

I want to avoid hardcoding URLs in blade

but that returs this url

ford.test.com/models

no model id!

Not sure if is relevant but in my controller CarModelController.php I defined

public function details($subdomain, $id)

why is not sending the id to the generated url? Do I need to send the $subdomain parameter to the detail function?

via Chebli Mohamed