Custom Add To Cart Code?

Hello, I am using the newest version of WP eCommerce and i was wondering if there was a way to link my custom add to cart buttons to WP eCommerce products.

My Add-To-Cart Button Code:
</div>
                        <a href="#" class="btn btn-warning btn-lg btn-block">Add To Cart</a>
                    </div>

Is there a way for the href tag to make you add a certain product to your cart?

https://wordpress.org/plugins/wp-e-commerce/

I’ve looked everywhere for the code and i can’t seem to find out how to do that.