It looks to me like the only way this will work would be to use 2 Aux switches. In order to work with dumb switches, the Inovelli needs a neutral. This means the Inovelli would need 4 wires going to it (Line, Neutral, Load, and Traveler). The only location that has all 4 required wires is the middle junction. Unfortunately, in a 4-way setup you also need a 4-way switch, which also requires 4 wires.
The best solution is probably to put the Inovelli in the middle (so it has a neutral), and place an Aux switch on the left and right:
You could put the Inovelli (dimmer) on the left or right, but it will be running without a neutral, which might mean that you need a bypass: