Well, you could read the datasheet (I think this is the one...)
**broken link removed**
If it's an opaque case, then you can use your multimeter...
The coil pins will have tens to hundreds of ohms. The closed switches will have almost zero ohms (if you have a continuity tester, use that) and once you know the coil pins, power it up and get the other side of the switch contacts with the continuity tester.