Right now, I have a hori wii stick, which is this guy:

Now I would like to use this said stick on the PS3, so can someone tell me if the following method would enable me to accomplish that?
After I open it up, I found that the buttons are directly soldered to the PCB like so:

I don’t want to desolder the PCB board, so I thought I would just solder a wire onto each contact (circled in red):

And then connect those wires to a Cthulu/ChImp board with a USB out. Voila, a PS3/Wii stick.
Would the above plan work?