C220 heated seats retro fit.

[HJHPH]

Hi all, having made several enquries into retro fitting heated seats to my wifes c class, I have now purchased a WAECO aftermarket kit. It comes with all the bits including relays and two position switches which have three wires going to them. I assume the blue 1 is common and the two white ones are the live for the low and high setting. What I would like to know is whether or not I can use the genuine Mercedes heated seat switches that I have purchased as they are also two position and would look nicer.
Can anyone tell me which plug socket on the back of the switch panel the seat heaters plug into?
Thanks
Paul.