1. Product Pages: For all items that you wish to be included in the curbside checkout options, uncheck This is a physical product. This will tell Shopify during checkout that you have the product on hand. 
2. Customize Product Pages: From the Online Store sales channel, proceed to the Product Pages. Once there, unselect the field for Show dynamic checkout. 
3. Customize Shopping Cart: While still in the Online Store sales channel, proceed to Cart from the drop down menu. Edit the field for Enable Cart Notes and insert "Please indicate your license plat number and/or car make and model"