2001 S-60 2.4T model. non-fog light option. want to add fog lights to existing plug holes below front bumper. is the car already wired for this? any advice would be appreciated.

The car is wired BUT you will have to buy the switch and have the car programmed to know the foglights are there.

thanks, I will check out pricing at dealer for parts. I have access to a Bend Pak hoist so the next thing is to lift up the car and see what mounting or other things i need.
have you ever purchased from autowebaccessories for aftermaket items ?

NO I haven't.
If you buy a Volvo Kit then you won't need anything for mounting all the brackets come with it.