You could do it that way, but it is best to bypass the passive midrange crossover using the digilog method.
It is easy to switch back and forth from all analog to mostly digital in this fashion. With the DCX working, you go directly into the speaker with the bass and mid/treble, and use the digilog strap to provide a signal to the tweeter through its passive crossover. To go back to analog remove the digilog and make your connections to the OXO and use the OXO outputs to the speaker.