Single Sign on with Gitlab 7.3.1

I am having trouble setting up single sign on with Gitlab 7.3.1. The documentation says to add an application and I see no Application area in this version of Gitlab. I would like to log in with an LDAP front end and go right into Gitlab with no sign on screen. There are already users defined in Gitlab so redefining users is probably not an option.

Can someone enlighten me how to do this? Thanks in advance…Dan.