In order to connect to a node you first need to login to your iOS app. Once you've done that you'll see the world map and our tiger nodes all over it. From this point you have 3 options in order to connect:
1. Click on the "Recommended Server" tab down the page and you'll be shown the closest server to your geographical position. Click on it and connect.
2. Click on the search icon in the upper right corner and you'll be given the list of nodes available in your subscription, ordered by latency; you can now click on any node from the list and connect to it.
3. Click on the map and zoom in to reach any node you aim to connect to, looking for it on the map. click on it and connect.