Dave, the loom will include presently redundant blue/yellow wires wiring under each wing probably terminating in female bullet connectors and cable tied out of the way. These are usually fed at the dash end by a fog light control unit that ensures fogs are only allowed on with headlights and will include it's own relay. The optional switch wiring should be in place as well. Look for unused multiway connector with just red/orange and blue/yellow wires.
