System connection IIKO with the website on opencart3

Good afternoon, is there a website delivery to opencart3, the service point connected the system to IIKO experience. Now there is a need to link the orders with order processing system IIKO, without changing its appearance and functionality for placing orders on the website. Search found module integration, but it carries more and templates, catalog, baskets, etc. This is not an option. If you were to experience a similar query integration with IIKO - write, discuss