All of the wires will be going to the opti. There is a coil a little smaller than the size of a baseball. You will find the coil on the driver's side, on the front of the engine. It is in front of the driver's side head or at least very close to it. On said coil, there will be a spark plug wire comming out of it. the other end goes to the connector on the opti in the one o'clock position.
You should not work on your car with out a Haynes Manual at the very least. This is not something unique to these cars. All wire sets usually have a coil wire included. Have you never changed a wire set before?
Not a bad rig to snag as a 'first car'. Mine was a $75 Chevy wagon. It's good to see you diving right in there. May I suggest one better than Jim B.'s Haynes recommendation 'at the very least.' Treat yourself to a Factory Service Manual (FSM). Not only are they gold for the price of coal, but search posts by Big Bad Wolf here for a possible treat along those lines.