Ah, well you don't need any of the OEM wiring, not even on the fog lights themselves.
You will need some wire (16ga to 14ga should be good) to run from your lights to the relay under the hood/fuse holder (included in the kit) and some wire (18ga to 16ga) to run through the firewall to connect to one of the wires from the kit. The other 4 or 5 wires are connected in the cab, behind the radio bezel. A roll of electrical tape or heat shrink tubing to cover any wire connections to help keep the elements out & basic tools, screwdrivers, wire cutters/crimpers, pliers, socket set, etc.
My kit bypasses everything OEM.
If you can squeeze a pair of pliers, you should be able to install my kit
My deluxe kit even includes an OEM fog switch.
Feel free to check out my wiring kit thread <HERE
A voltmeter or test light will come in handy if you don't already know which wires you'll need to tap into (I include my instruction manual with each kit to make life easier), but I bet your 97 is pretty close to my 96 wiring, so you can probably use my wiring instructions.