What is actually sticking out of the PSU? Is it tabs that you could just solder to or find a push on connector for ?
Its hard to tell from the few pic's I can find.
Is there a fan in the PSU or does it need provided?
Thanks,
The backside:

Basicly the flat ones are 12v/ground/12v/ground on each side and you connect 3 of the middle pins to turn it on and keep it running.
I do not have any extra cooling on mine.
If you do not feel like soldering directly onto psu, you can buy flat cable shoes (not sure if correct translation) and press them onto the flat metal bits.

That's what I'm using at the moment, 6.35mm ones, but they tend to move out of the tabs.
There are 2 fans inside the PSU, 60mmx38mm, high CFM (loud), similar to the ones sold here:
http://www.frozencpu.com/products/8858/fan-545/Sunon_60mm_x_38mm_Extreme_Fan_-_3-Pin_PMD1206PMB1-A.html?tl=g36c15s927Back to drilling the prototype board.