Need help with "static electricity generator".

So I originally tried to build a van de graff generator, that didn't work out so well.
In the end, I settled on this project:


"Negative ion generators" seem to just be high-voltage generators with the price marked up by a lot, and they are harder to find on the internet, so I bought this:
http://www.ebay.com/itm/Boost-Step-...874?pt=LH_DefaultDomain_0&hash=item258c1a29fa

I have my switch, an adapter for x2 AAA batteries, and some wiring + heat-shrink tubing. The high-voltage generator will arive in a few days, but I still don't exactly understand how I would hook up the two output wires. I plan to follow the exact same setup as the guy in the video, but he talks about a ground wire and the high voltage out put. As far as I know, all I'll have on the generator will be + and - terminals. How would I hook up the positive and negative wires to achieve the same effect as the guy in the video?

Also, there was a high-voltage generator that went from ~3-6v to 400,000v. Would that have been better to buy?