To create a new Hermes DE integration in Shiptheory go to Carriers > Manage Carriers and then scroll down until you see Hermes DE listed.
Click on Hermes DE and you will be taken to the connection page
Once on the connection page, click Connect and you will be redirect to Hermes DE to log in.
Enter your login details, then click register and you will be redirected back to Shiptheory.
When back in Shiptheory make sure you have filled out your Default Parcel Dimensions.
Hit test connection and you should see a green tick and a success message.
Hit save to ensure that your default dimension changes are saved. You are now connected to Hermes DE.