I ran into a problem in my new house, because, even though the electrician was instructed to have a neutral in every box, he installed many "dead-end" 4-way and 5-way circuits. This meant that the line/hot and load/light wires were in the same box and the white/neutral wire was converted to a traveler. The telltale sign of this is a white wire wrapped in black electrical tape at its end. I contacted Intermatic who said that the HA-14C wouldn't work in this scenario. After reviewing the situation for awhile and getting a brain cramp from trying to understand multi-way circuits, I figured out how to do it.
The first image is what a typical multi-way dead-end circuits looks like. The second is how I converted it to use HA-14C / HA-14WD switches. The first switch beyond the Z-wave switch is changed from a standard 4-way to a standard 3-way switch. Otherwise, the wiring changes are only in the Z-wave switch box. The third and fourth images are wiring diagrams from Intermatic for the HA14 and the CA600. It looks to me like this wiring method will also work with the CA600.