How to add button to opencart 2x template demo?

Question

opencart

Hello! I want to make a template store on Opencart 2.1.0.1, everything seems to be clear how to do it, except for demonstrating the landing template, (so far I’ve only thought of uploading all the templates to the demo folder and giving a link to view the template in the product card. PS: If there is a better write ideas or ready-made modules for implementation)
Question: How can I make a link to the demo?? Of course, you can shove a link to the product description, but you don’t want to. The screenshot shows how everything should look like, are there ready-made modules for adding a link, or is there any solution ??