The connections where shown in the older Quick Start Guide. The latest one seems to no longer show it.
You do know that only one Dallas DS18B20 chip is supported by the EZIO8SA? As shown in the EZIO8SA Quick Start Guide.
OK from an older EZIO8SA Quick Start Guide. I doubt it has been changed in later production runs.
RJ12 Connector on the EZIO8SA:
Pin 1: +5 Volts
Pins 2,4,6: Ground
Pin 3: 1 Wire Buss
Pin 5: No Connection.