Profwombat - did you ever manage to get this to work ?
That strip is 12VDC. The Arduino's Digital Outputs are only +5VDC. I'm thinking you would need to up convert the DIO's voltage to 12VDC, by using the 5VDC to drive an optocoupler,
I have connected everything as shown in the images (sorry, they failed to upload).
No, the strip is powered by 12V but it's data line requires a 5V or 3.3V signal.
I don't think that 3.3V is enough. But maybe 5V?