Cartek fog lamp switch, momentary action

[Carl Warren]

I’m struggling getting the cartek fog controller working. 
mad you can see I’ve only got two progs to

the rear of the switch. Instructions showing three .. 

Any wise person sketch something up to get this working? 

Thank you. 

[Ian Kinder (Bagpuss) - Joint Peak District AO]

Try it across the yellow and black,

 

This is the factory diagram (sorry, about the quality)