Heating seat control unit B class

[gole]

Can somebody help me please. I m doing heating seat retrofit in B class and have few question about heating seat button switch connection...
What is cat. number of plug housing like one on photo? Is that housing for button switch?
What is cat. number of that flat pins? There are two small and one big pin for plug bushing.
Thank you...

 

[bigmacplease]

There's a guide to do this on Benz World.