Retrofit fog lights

[Migger]

I am hoping someone out there has the answer to my issue...... I have a very basic but immaculate Touran to which I want to add below bumper fog lights. Fitting seems straight forward BUT as a basic model, the light switch loom plug has no facility to add the trigger wire to the assembly so it contacts with the switch itself. Has anyone ever upgraded the plug such that all pins are active and the trigger wire can be inserted into the plug?