Actually, the serial ATA power connector gets plugged into the thermo-nuclear oscillating capacitance unit. If your motherboard doesn't have one, you got screwed. You should have bought Asus. It provides 21.4% more power on the unit seen here while drawing 6.41 less amps of current. That then saved me enough juice for the 6 harddrives I have plugged in to my two PATA interfaces.
I don't know what the hell the picture has to do with anything, but as we're all just throwing random anecdotes and stories at our readership, I thought I might give you a wierd picture.
Oh, and as said, yes it will work as you appear to have found out and that appears to be a very nice little unit if you don't mind my saying so.
edit: Ok, I'll stop now... I should ease off on the Coke.