Help with Alarm PIR Wiring

[curtly]

Hi everyone, would like a bit of advice regarding the wiring and replacing of an old PIR. This PIR is in series with another one for the Zone
From the picture, my assumption is:-
A = + (Two wires as got to other pir)
B = - (Two wires as got to other pir)
C = just joined (NC to other PIR)
D & E = N/C

does this seem correct ?

 

[secureiam]

The wiring of the new pir?

if the alarm or tamper is wired in parallel both zones would need to be in tamper or active for the device to activate, in series only one has to activate.

the question dont know what any of the terminals are (A and B look like power) and how the cables go from the panel, to each pir and back

 

[sparkymarka]

Looks like a old securis pir