Ok, Here's my notes on it:
The way I labeled the pins do NOT corrospond with the way they are labeled on the board. I didn't notice the labels until it was too late
The point of this is to find solder pads so its easier to extend it without bridging the points.
Picture One: DD mobo plug's pins (plug desoldered)
Picture Two: Solder pads for DD mobo pins (bottom of board)
Picture Three: GC plug pins (top of board behind memcard port 2)
Pins 5 and 22 on the second pic I could NOT find a solder pad for(without it being very complicated). Just solder to the pins that go to the plug, or the holes that the trace goes through. I did all this because it makes it easier to get good connections and a good learning experience for knowledge on which points I do NOT have to solder wires to.
The best solder pad for pin 23 is shown in picture one. Follow trace on Picture 2. It goes through the hole.
This reduces mobo to mobo wires from 32 to 20 wires
Connect these pins on DD mobo and GC mobo:
ALL GND: 21 25 26 27 28 29 30 31 32
OTHER: 17 18 19 20
Also, You may want to download the pictures to zoom in and get a better look.
EDIT: switched order to make more sense
EDIT 2: added 3rd pic and updated some info
EDIT 3: Do not attempt to execute this info until I can verify it completely by testing. Should it be correct(or verified), Could a mod sticky this?