How to remove the back outside light assembly for hyundai i30 GD?

How to remove the back outside light assembly(rear turn signal light and stop/tail light) for hyundai i30 gd?
I was trying to install another indicator into it.
It does not showing how to remove the assembly on the manual,
any 1 know how to do it? please give me a hand.

reference ,In the manual(page 7/75, australia)

Outside light
rear turn signal light and stop/tail light
1. Turn off the engine.
2. open the tailgate.
3.Loosen thye light assembly retaining screws with a cross-tip screwdriver.
4.remove the rear combination light assembly from the body of the vehicle. (please show me how to remeve form the body of vehicle.)


Thank you very much!!!