You can't use two OPMSCL-153M dimmer/sensors on the same 3-way circuit. You could only use the dimmer/sensor on one side of the 3-way, and either the MA-R accessory dimmer, or a standard 3-way switch on the other side of the 3-way.
If you want to have occupancy sensing on both sides of a 3-way, you would have to use the LRF2-OCR2B-P-WH ceiling-mounted occupancy sensors at each area, and have those sensors programmed to the Maestro Wireless MRF2-6CL-xx dimmer and MA-R accessory dimmer.