OK, C072 RIO fitted next to the main panel.
Couple of questions:
1) Zone wiring is different, no 12v on the Zone terminals ( 1, 0v, 2, 3, 0v, 4 etc), I presume the 12v is connected to one of the 12v outputs on the opposite side of the expansion modules?
2) I can't find a wiring diagram for connecting the RIO to the main panel - Looking at it it looks like the B & A terminals on the RIO, but not sure the other end