It seems this may be some problem, as I just ran into the same issue. I am sending out replies to those who have asked this question to see if they have yet to figure it out. I also sent a e-mail to rugged ridge about it too. They do not work on my 2004 WJ without drilling. Did you figure out a solution? Otherwise I will write one, when I figure it out. Thanks!
WJ 4.7L*245/75R16*Mopar Front/Fuel Skids*KOR T/C Skids*JCR Sliders*Flowmaster 50*Airraid MIT*OME HD*Bilstein 5100s*JKS Trackbar*ARB Bumper*SB XRC 10*Zone links*Almost as much electronics as Batman..