damaged fog light wiring, trying to repair-question

Hi fellow Prius nerds, I've luckily discovered that my gen. 2 is fog-light capable, found out that it used to have them before an accident before I owned it. I've plugged in one light on one side and it works, phew. BUT on the passenger side, the wiring is damaged, see attached pics. I got a new wiring harness with my new light set, so I'm thinking I can just splice one of the plugs into the damaged wire. I haven't done this kind of wiring before (I've rebuilt the HV battery, but haven't spliced a wire/wires). On the driver's side and also on the new wiring harness there are 2 wires that go into the plug, on the damaged passenger side there's the 2 plus on green one that's dangling off that I'm thinking is a ground. How to proceed with that, if it is a ground? Many thanks for checking out the photos, you can see the damaged wire w/out the attached plug, the green extra and the new plug from the wiring harness.

 

Interesting, I thought they looked useful. I was worried about the driver's side terminal too, it was pretty gross but worked pretty well. But these being exposed like this are probably corroded like you say. I also discovered that there isn't a 3rd wire after removing some of the harness covering. The ground must be further up the wiring harness. Just the two wires that go to the housing. Thanks Chapmanf

 

Right again, after separating the wires and taking off old tape and insulation, etc, I found not 3 but 2 wires... I successfully stripped the wires on the damaged side, connected the wires, and then plugged in the driver's side to the existing plug; for whatever reason the original cord was too short! So just decided to cut that off too and splice on the new plug that came with the set. Kind of a grueling process all in all that involved taking the bumper half-way off, pulling back the mud flaps...but now they're in and they work. Now to see if they're effective in the fog...