I don't know if the dash is the same for 2003, but I took out the ash tray and mounted it in the hole. It's easy to reach, and if I want to someday remove it to sell the truck, the ash tray snaps right back in leaving no visible holes.
I did think about the knee bolster, but I disagree that it would take a "horrific" accident to hurt your knee. The knee is a very delicate joint. Even in a low speed fender bender if the corner of the Prodigy hits up under your knee cap, you could have knee problems for the rest of your life.
2007 KZ 22 Sportster Hybrid Toy Hauler
2003 Dodge Ram 2500 4x4 Hemi Quad Cab Short Bed
1990 Harley Electra Glide Classic
2005 Harley Sportster 883L
I put mine on the right so that if anything physically happens to me driving the wife can lock the trailer brakes down to possibly help stop the truck.
2007 Dutchmen 29QG-S
2003 Dodge 2500 Quad Cab 4x4 5.7 "Hemi"
Equalizer and a Prodigy