I'm about to do the same install and I haven't found an easy solution...
97stscaddy - the problem is that on the 2nd Gen headlights there is only one plug on the back of the headlight assembly. Inside the headlight are the individual plugs for the low beam, high beam, turn signal...
It would be nice to know if the ends of the headlight harness that plug into the body harness are the same for the 1st and 2nd Gen - does anybody know?????