What is a controller address?

[CrazySwimmer]

I am tryingt to get this mario kart wii gecko code to work, but i dont understand what he is meaning :S code below:
$Moonjump [Bully@Wiiplaza]
C25AA70C 00000006
3D808034 A18CYYYY
2C0CZZZZ 40820018
823E006C 3E000002
7E308A14 923E006C
48000008 D33E006C
60000000 00000000
**Upgraded mdmwii´s code to full ASM*
**YYYY = Controller Address*
**ZZZZ = Button Activator*


I know what button activator i want to use but what is the controller address?
Please help!

[ExtremeDude2]

I would assume it is the player number, not sure what code is for which player however.