@plundh - as requested!
@fireheadman, if nice enough, can double check the setup of the wiring to ensure that I have it correctly drawn out.
I made these from memory and from pictures I had. It has been many months since I revisited this, so I went off of the memory I had.
The Rocksoul Power Supply has four wires after taking the casing and shielding off - red, black, white, and green.
The black and red are ground and power respectively. These wires were stripped and I applied a higher, thicker gauge wire going out to both the barrel adapter and the 6 pin. I found these barrel plugs which are 5.5 x 2.5. These 5.5 are a little bit longer than needed and doesn't sit as well as it should but does work. The barrel plug has thinner gauge wire and you simply unscrew the black cap, and identify ground and power (LOOK AT THE AKITIO BACK DIAGRAM FOR PROPER POLARITY. THIS IS CRITICAL, DO NOT MESS THIS UP). Then I soldered those components and reseated the cap on. The wires are loose but you can clean up as necessary. I then used my thicker gauge black and yellow wire for ground and power. I found something similar to this that I cut the one ends off and soldered all three ground to black ground and all three yellow power to the big yellow coming out. Make sure you measure out to ensure the length is enough to reach your Akitio! The switch is a simple switch that has a screw cover that comes off. You screw the wires down on both sides (the white and the green wire, mine are both red so disregard my poor planning) and then the switch will control turning the power supply and Akitio on at the same time.
Hopefully this helps someone. Sorry for the poor write up, all going from many months of not actually looking at the unit and the wiring.