I have an LS, and put some fog lights in, not from an ss. i bolted them to the plastic, it was pretty close to being flush. there isnt any wiring in place, even if there was, theres no switch inside. im not sure where the switch is in an SS but i mounted my switch to the right of the headlight ****.

 

ummmmmmm to the right of the head light switch is where it is on the SS models also so ya might dig in there and see if ya find a extra plug. If ya do at least ya have the switch plug and then ya can steal the switch out of a SS in the bone yard