power wire routing

you could always run it down the firewall in engine compartment with protective shielding then run it along the frame in some pvc or something of that nature (painted to match if you want) then go up into the back of the explorer where you can as long as your gas tank doesnt get in the way of drilling any holes or anything like that.

under the carpet by the gas pedals lift the carpet up and pull it back almost until you can see the flat floor. after that you should notice a spot where the floor starts to curve into the firewall. you should see a spot that is an indented circle about 2 inches in diameter close to the bottom of the brake pedal.. drill through that and put a gromet or something to protect the wire from getting cut and you are done

as always, double check where you are drilling to make sure you dont hit anything important, but if your model explorer has this spot then there are no worries and you car make the hole as big as you want.