Step 1: Go to the TMS URL: 

Step 2: Choose the correct account

Step 3: Click on the PBX Manager menu item.

Step 4: Click on the Hunt Lists sub-menu item.

Step 5: Click on the “Add Hunt List” button top right or Edit an existing Hunt List.

Step 6: Give the Hunt List a name and a description (If it is a new Hunt List)

Step 7: Create a ring group or go to the existing ring group. 

Step 8:  Click on “Add” on the "Extensions to ring", select the extension and click add. This will add the extension directly next to the first one.

Step 9: Repeat step 6 to add more extensions. Once all your extensions are added, click on "Apply”.