Because of the way the Matrix controller's buttons are laid out it can be a real mess to swap them around. It's recommended to use the
Wireless CG or
Wireless CG2 version of controller if you want to do that kind of thing.
WIRELESS MATRIX DIAGRAMTOPBOTTOMTP1 - B+ (PnC Pack and AA Pack)
TP2 - Ground
TP3 - B+ (AA Pack)
TP7 - Analog Voltage, 1.6v (Switched)
TP10 - Light Rumble
TP11 - Heavy Rumble
TP22 - Ground
TP25 - Start