Start off by navigating to the social tab. By clicking the icon second from the left in you bottom navigation bar (highlighted in black).
Then click search in the top right corner (the magnifying glass)..
Click in the search bar and type the name or email address of the person you are hoping to connect to.
Numerous options for your search should now display. You can either send a connection request immediately or you can click on their names to view their profile and send the request from there.
If you would like to find connections faster you can navigate to the profile of your connections. From here you will be able to view their connections.
If someone else has sent you a connection request navigate to the social tab. Then click on connections and you will be able to accept or reject incoming connection requests from here.