Installing through the grill fogs

[Zithlord]

I am installing some fog lights on my car. They are the Hella TN4 US fogs.

I have read that they do not need a relay and that the wiring from the grills to the fusebox(lower) fuse #8 is already in the original wiring harness, I have found these wires. But what about the harness from the dash switch to the fusebox? I guess that this harness is not a part of the original harness on cars that did not have the fog option from the factory. What colours should these wires have and how do they hook up to the switch and the fusebox?

I have a single stage switch, but do not know what it is for(look at the picture) and I am not sure how to wire the switch if I can use it.

I also read somewhere that the fogs is supposed to turn off when the high beam is turned on, how is that possible with the original setup without the relay?

I would like to replicate the original setup if possible. I have read all the previous post on fogs but still need some more info. I hope someone can help...

If someone has a original harness from the switch to the fusebox I would like to buy it, if its for sale. (also the correct switch)

BTW I am a monkey when it comes to electrics in cars

Best
John