jungletronic

It helps to remove the L2/R2 button- pull it straight off the frame that it pivots on and keep the pin/spring in the button. The flexible circuit flap slides into one side of the frame that the L2/R2 button pivots from. The circuit flap pretty much snaps in and stays if you don't pull on it too hard. Place the rubber piece back over the circuit flap and pop the L2/R2 button back in. Place the L2/R2 button/frame/circuit flap assembly into its designated slot, then slide in the L1/R1 button, then slide in the piece that goes in between the 1 and 2 buttons. Put the controller's back cover back on and screw that mother together.