After logging in to your store, you will have to navigate to Settings -> Shipment Management.
Click on the Add button to add new courier connection.
Select the option you want to use.
Once you selected the option you want to use on the next page you will have to fill in some fields with the required information in order to connect your DHL account to our software.
If you scroll down you will be able to select the services you will be using, once done with everything just save on the bottom of the page and you are ready to go