I mounted my waterproof Painless Wiring Cirkit Boss (purchased from Geno's Garage) under the drivers seat (on the outboard side... attached to the side of the steel seat frame). Only two stainless steel socket head cap screw heads are visible of the four used to mount the unit. The wires were extended and routed through the slot in the carpet that was provided for the power seat track wiring. Each of the excess wires are coiled and wire tied, stored/covered by the top edge of the carpeting below the steering column. Easy access when an additional circuit is needed, but out of sight until then. In addition, the cut end of each wire end is folded back 1/4" onto itself with two different colors of heat shrink tubing applied... one color to denote constant on circuits, the other to denote switched on circuits. This allows ease of circuit identification (by type) at a glance. The results are a very clean installation with ease of servicing fuses due to mounting location.
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'98. 5 2500 QC 4x4 Sport, Glasstite Vision II, 285 BFG A/Ts on M/T Challengers, Warn 4X Boards, Mopar fender flares & tow hooks, NW Custom s/s-rubber mud flaps, Mag-Hytec diff. cover & trans. pan, Edelbrock IAS shocks, Reese Titan V hitch, VDO Vision gauges, Dynamat, '00 Sport grille & valve cover, '00 Sport headlights/PIAA Super White bulbs, PIAA Dual Sport 900 aux. lights, BD exh. brake and TorqLoc, Prime-Loc, Bosch 275s, VA CPC, DD Boost Module, Banks Stinger wastegate actuator, ATS exh. man. , Banks 4" dia. s/s exh. sys. , BD V10/Cummins hybrid TC & valve body, BD trans. front pump & PressureLoc, Air Bulldog induction hood (with NACA ducts), plus MANY other trick modifications