Siemens SIRIUS 3RT Manual page 436

Accessories
9.29 Wiring kit for contactor assemblies for star-delta (wye-delta) start (sizes S6 to S12).
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Slide in the lugs for screw fastening on the timing relay.
Screw the timing relay tight onto the base plate.
Break off the extension tabs on the covers for the wiring block.
Slide the wiring module covers and the terminal covers open.
SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
Manual, 09/2017, A5E03656507120A/RS-AE/006