first thing you need to know is my wire color pinout:
------- BLUE -------------------- +5V
------- EXPOSED WIRE -------- GROUND
TP63 - RED -------------------- LEFT TRIGGER
TP19 - PINK ------------------- BACK
TP64 - GREY ------------------- RIGHT TRIGGER
TP18 - BROWN ---------------- START
TP13 - BROWN/WHITE ------- UP
TP15 - WHITE ----------------- DOWN
TP16 - TURQUOISE ----------- LEFT
TP17 - ORANGE --------------- RIGHT
TP69 - GREEN ----------------- BLACK
TP72 - YELLOW ---------------- WHITE
TP71 - RED/WHITE ------------ Y
TP70 - BLACK/WHITE -------- X
TP68 - PURPLE ---------------- B
TP67 - BLACK ----------------- A
take the female end of your vga cable cut it and very carefully strip it like this

now take apart your fatboy controller and remove the memory card casing and shove your vga cable in the bottom memcard slot like this


Now go to here
anduse the 2 pics to find the solder points on the fatboy controller.. he does not show the l and r triggers but you can find them really easy. remember use my wire color scheme not his.. otherwise my whole tut is a waste of your time.desolder the 5 pins off the bottom usb memcard and snap off the memcard port

now that you have the fatboy controller done it is time to do the old school controllers.
on the old controllers you may need to remove the old chip.. also removing the old wire pins is optional you can just snip them off. ok the fastest and best way to remove a chip is with a heatgun or a blow dryer..once the chip heats up enough you can easily pry it right off without damaging the solder pads

and if you choose to completely remove the old wire pins you can use a desoldering iron (my personal choice) or a desoldering braid. otherwise you can just snip the wires off

now on the rest of the tutorial all i am going to show you is the controller and its circuit board with the color wires that get soldered to each one.. light grey represents the bare ground wire.
an nes controller


a snes controller

















