The Connections tab can be accessed by clicking on the button outlined in the image below. All Connections and Relays in an Organization will be found here. There is also an option to search as well as create Connections and Relays.
Click on a Relay or Connection dropdown arrows as shown in the image below to expand. These will be shown in the Solution they were created in unless created in a Global Solution.
Search
The search bar can be used to search for specific Relays or Connections as shown below.
Create Relays or Solutions
Click on the buttons shown in the image below to create a Relay or Connection.