You can either re-use the existing female 2-pin connector, or buy a new one. These instructions are written assuming you bought a new connector, and are wiring the fans with a new harness.

This method has the advantage that you can test the fans/harness assembly before you re-assemble the whole kazoo, fill it up with water, and then find it does not work. (...And rinse, and repeat, and rinse and repeat, in your author's case. )