Siemens SIRIUS 3RT Manual page 400

Accessories
9.28 Assembly kit for contactor assemblies for star-delta (wye-delta) start (sizes S00 to S3)
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Attach the wiring module for connecting the main current paths to contactors Q11 and Q13.
The wiring modules for connecting the control current paths are not needed to build a contactor
assembly for star-delta (wye-delta) start with function modules.
Attach the wiring module for the neutral bridge to contactor Q12 from above.
Attach the wiring modules for connecting the main current paths to contactors Q13 and Q12
from below.
Screw the wiring modules tight with a screwdriver.
Screw the conductors tight with a screwdriver.
SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
Manual, 09/2017, A5E03656507120A/RS-AE/006