1.   Visit this page here and follow the steps below.

2.   Click the download module button on the right of the page to download the server component

3.   Unzip the contents of the folder downloaded.

4.   On your miva merchant store admin, expand global settings and you will see a link for Modules and next to that there is Add.

5.   Click Add, then click the upload button.

6.   Select thub.mvc file downloaded in step1 above and then click Upload.

7.   Click Add.

8.   Now click on Utlities and check the T-HUB Connector.

9.   On the T-HUB Connector tab, set User name and password that you can remember and click on Update.

Open T-HUB

10. Click on the “Add Online Store” icon under Online Stores tab.
11. Select Miva Merchant as Store type (shopping cart) list.
12. Enter the date from which to start order download from.
13. Enter your website request url for Thub script as noted in step 9 above
14. Enter your user name and password here from step 9 above.
15. Click on Test Store Connection. If all the parameters are correct you should see a message like store successfully connected.
16.  Click Save & Close to close the add online store form.

Click Here for instructions with screenshots