Factory fog light wiring

[LuxeLux]

Does anyone know how to get the factory fog light wiring to work using an aftermarket switch? Does it just need a switch and Are the relay and fuse already in? Thanks

[numberplate]

I had a look prior to fitting mine - no fuse and the wiring and plugs are there behind the bumper but no relay. the relay is behind the radio so it has to come out to fit one. then i found 2 of the relay socket pins had nothing connected!!

its much easier to install an aftermarket harness and switch which is what i ended up doing.