Xbox 360 Modded Controller (Help)

Hey I'm not sure if this is the right section for this or whatever but anyways, I have a 360 controller that I am trying to mod and I'm have some problems. I have the D21 and I'm not sure what points i should solder it to. When i touch the wire to the middle prong on the right side and either under the D21 Led or in the other socket below R21, it doesn't let me fire the weapon at all. If you know anything about modding xbox 360 controllers and if you have any advice, Please Post! Thanks

 

Ok listen up done this several times.

First step this is what i want you to do.


On the back where u put the batter pack on there should be a bit of the circuit board visible.

Can you tell me what number is there?


Is there a CP3?