Below are diagrams showing how to connect the electrical wires in the airpointer.

Diagrams of the Base Unit:
4D airpointer
HC airpointer

Diagrams of the modules based on Thermo benches:
Thermo O3
Thermo CO
Thermo SO2
Thermo SO2+H2S
Thermo NOX

Diagrams of the modules based on API benches:
API O3
API CO
API SO2
API SO2+H2S
API NOX

Diagrams of other modules:
BTEX