Connect either one wire from the primary (the low voltage side) to one terminal of the battery (don't worry, you can connect it any way round). Then bring two secondary wires (the high voltage side) very close to each other (about 2 mm) and then tap the other primary wire to the other terminal of the battery.
And then, you should see sparks on the ends of the secondary wires, and you may hear a little "snap" too!
––––––––––––––––––––––– "Energy cannot be created nor destroyed!" –––––––––––––––––––––––