I know this has been covered, but how do you change the ignition switch?

[LuckyScott]

Okay, stupid question, but how do you change the ignition switch in a 72 suburban.
I did the trick where you put the key to the left and stick a paper clip in the little hole, and that worked to get it apart.
Then I changed the ignition part in the back, but the back side bezel on and for the life of me, cant get it back together.......
Then I thought, hey, lets try putting the key lock part in the old switch so I can see how it goes together, and now it is stuck in the old ignition on my bench.
Of course, its saturday night, and no where to buy a new key lock until monday.
Please, somebody, tell me how it goes back together.