Just use any decent flying bus cable with the right amount of headers. However, DO keep an eye on your current draw figures...you don't want to exceed 3/4ths of the power supply's current capacity due to potential problems with power inrush, which can send your amperage draw OVER the design limit for the p/s for a small fraction of a second...which is enough to cause problems. Also, if there's a wide gap between potential supply and draw load, this means your p/s can run cooler...and given that heat is Public Enemy #1 for electronic components, that's something you want.