On the back side we see the ENORMOUS heat sink which allows this device to be passivly cooled.
Underneath the simple warning cover, we have a plethora of connection points. Most of these are used for remote programming of voltages, running supplies is series or parallel and a variety of other functions. The ones that are improtant are +, -, S+ and S-.
The + and - terminals are exactly what you think. They are just rear outputs for the voltage. The S+ and S- are a bit more special, these are sense lines to sense the voltage at a remote point. This is very useful if you are powering something several dozen yards away where the voltage drop in the wire becomes VERY significant.