So...
I have ordered an adapter card
I found some adapter cables similar to this on german ebay(satacables won't ship to EU):
Google Image Result for http://www.satacable.com/images_products/sata-power-cable-splitter-two-15-pin-and-one-4-pin-molex.jpg
this way I can plug into the SATA output and connect the 4-pin Molex connector on the adaptercard and still have sata-connectors for the drives. We'll see how it turns out..