activate the electrical PTC auxiliary heater

[Tino123]

I need your help. I have the Kuga 2 vFl 01/2016, 150PS ecoboost.
Where do I have to activate the electrical PTC auxiliary heater? I have retrofitted the auxiliary heater and would like to activate it and, if possible, have it shown on the display in the speedometer.

[FLA242]

see attached picture

[Tino123]

Thank you...