As posted above, the fog light switch moved to the turn signal stalk, but in 2001. If you bought a Jeep accesoriy kit it should have the correct switch in it. In 2003 the dash panel changed to hold 4 switches left to right, Rear Defog, Rear Wipe/Wash, O/D off (if automatic), and Axle lock (if Rubicon).
If you are doing your own adapting with a 2000 and earlier switch, I suspect the switch will fit into one of two right hand holes. It is fairly easy to remove the switch panel, but be sure you have all screws out. It doesn't have to be forced to remove it.
Jean - Wonderful wife
2003 Toyota Sequoia
2005 FA64 (aka LJ) Khaki
Heidi - Golden Retriever/Jeep Dog