Xbox Player Button?

I’m in the process of planning out the construction of my first stick (and buying parts online) and I was wondering what people do with the Xbox Player button (the one that lights up and tells you which player you are).

I plan on modding a wired Xbox 360 controller and among the examples I see, I can find the 6/8 face buttons and 4/2 more on the side to account for all 10 buttons on the Xbox controller (counting start and select) but I just cannot find one with an Xbox player button on it. What do joystick builders do with this button?

I’m pretty sure you’re talking about the Guide button (brings up the menu in-game)? It’s labeled GU on all of the Slagcoin diagrams. You can either map it to a separate button or put it where the Select/Back previously was.