There is a side plastic cover on either side of the dash, remove the cover, you will see a round hole with expandable foam, use a piece of wire hanger to punch through the hole into the engine compartment.
08 Wrangler X DETN8R Yellow Rough Country 2.5" progressive rate coil lift, 2.2 shocks. 1.25" body lift, disco's, steering stabilizer. Benchmark EVAP skid. TeraFlex front bumper with shackles. 35x12.5x15 BFG A/T KO's on MB72 wheels.Cobra 75 on a Firestik. Arizona Rocky Road antenna mount. Ward bug shield, DayStar hood wranglers, upper dash panel. Qtech arm rest.
2002 Wrangler Sahara RIP
1979 CJ 7 258 RIP
1975 Cherokee S 401 RIP
There is a like 1 1/2" rubber grommet that is behind the steering wheel that I have ran all 10 of my wires through.
07 JK 2D X model with 6 speeds. Full Traction 3" ultimate lift kit. 315x75x16 Toyo Open Country M/T on Rock crawler procomp rim. Ruby dana44's front sleeved inside/outside C truss and rear with 5.13's gears. Homemade rock guards, rear bumper w/tire carrier, oilpan/tranny skid, evap canister skid, light bar, switch pod. Riddler diff covers, Cobra 75 w/wilson antenna, Polk speakers, 10" sub, 2x Amps, Lightforce 240 drive light, backup lights, rock lights.
If you pull the grey installation back that is on the firewall just behind the battery there is a hole there. There will be a shiny black material like tape under it that you can push through with your finger and run the wire right in. It will come out a little high on the inside of the firewall but runs right down. This is very easy to get too. It is just under the wiring harness on the firewall behind the battery. Hope that helps you out. I don't have enough posts to put up a pic for you.