Here is a pic that i found since i didn't want to take my cluster back apart. Its terrible quality but you can see the 5 bulb sockets the red arrows are pointing to, those are the ones you will replace with the wedge bulbs. Just take a pair of small pliers and twist the black socket about a quarter turn CC and the bulb will pull straight out. Then just pull the incandescent wedge bulb from the socket and replace it with the led wedge bulb, then put the socket back in the hole and rotate a quarter turn clockwise to lock it back in place. It may seem complicated through all the these different numbers and bulb types and such but it is really as simple and as self explanatory as changing a regular light bulb once you order the correct leds. Theres also a good video on youtube showing how to remove the gauge cluster in a wj, just search for wj gauge cluster removal and it'll pop up.
^boom right there. Takes about ten minutes total. Just pop the lid and behind the steering wheel and two screws then unplug the cluster.
3" OME HD springs, Bilstein 5100, JKS adjustable trackbar, Moog SS, IRO UCA'S & LCA'S, 3/4" front and rear spacers, BFG M/T km LT255/75R17, JK Rubicon takeoffs, 8K HIDS Hi's & Lo's. full Rockford Fosgate set-up, blue l.e.d. interior, clumsy driver