there is a wiring harness inside pcb cover that links connector block M6 to timeclock
remove this harness (with the power supply to boiler turned off!) from M6 and timeclock. do not remove clock from boiler
you now have 4 empty spaces on the M6 connector block
the blue one goes to the NEUTRAL on the Salus receiver
the brown one goes to the LIVE on the Salus receiver
any black one goes to COM on the Salus receiver
other black one goes to NO on the Salus receiver
remove this harness (with the power supply to boiler turned off!) from M6 and timeclock. do not remove clock from boiler
you now have 4 empty spaces on the M6 connector block
the blue one goes to the NEUTRAL on the Salus receiver
the brown one goes to the LIVE on the Salus receiver
any black one goes to COM on the Salus receiver
other black one goes to NO on the Salus receiver