you are on the right track!
the "V shaped" finger rings (I like to call them finger clips ;) )are for putting at the base of whatever finger you like(at least that's the most convenient way to do it, you can put them on your feet, stick them in your socks or something but then you're not so mobile)
and also you can get a couple of paper towels, wet them down and put them between your finger and the ring in order to increase conductivity.
The have been some concerns about coppers toxicity but I really doubt that this zapper is going to put much on your body and plus copper is needed for your body like other metals such as Iron, zince etc.
so yeah, just plug in the battery and stick the rings on and then continure through your day for 7 minutes, go off for 20 etc. :D