1. Download the web component from http://www.atandra.com/downloads/thub-component-opencart-release-v1.zip
2. Unzip the contents of the folder downloaded.
3. Upload the files to your OpenCart Server - under admin and thub folders
4. Login to your OpenCart admin page and go to Extensions > Modules and click install link for Thub
5. Open T-HUB
6. Click on the “Add Online Store” icon under Online Stores tab
7. Select Custom cart direct as Store type (shopping cart) list.