My guess is that you'll find a small capacitor glued to the back of the tweeter. This is the crossover. The tweeter is an EXCELLENT tweeter made by Audax in France. Polk Audio uses this tweeter and charges big bucks for it after they put their name on it.
That tweeter does not really appreciate a 6db/octave crossover though. It would prefer a 12db/octave (which is a capacitor and a coil, rather than just a capacitor).
So this is an area for upgrade: replace the 6db network with a 12db.
The midbass speaker is probably smooth enough not to need a lowpass, but if you wanted to get picky, a coil in series with it can be done. I'd love to see a closeup picture of the front and back of that driver to see if I can determine who makes it.