Connecting The Delivery Group and Shiptheory is incredibly simple. 

Firstly navigate to Manage Carriers from the dropdown at the top right of your screen. 

Alternatively if you are using the advanced dashboard then click on Manage Carriers in the carriers pop-out on the side bar.

Then scroll down until you find 'The Delivery Group' in our list of carriers. 

Click on The Delivery Group and you will be redirected to its settings page. Then enter your Delivery Group username, password and account number and a set of default package dimensions. After that click Test Connection and Shiptheory will attempt to connect with The Delivery Group using your credentials.

If everything goes well you should see the following:

If you have any issues or extra questions during this process, please don't hesitate to contact support.