I replaced the cable myself and found that there is no NUT in the fender. The bolt holding the ground wire to the vehicle just screws in an out freely. I had a terrible ground connection, and after replacing the cable, cleaning both terminals, using the "grease" on the terminals, the pads under the connectors, I found that I did restore some lost horsepower. I felt a noticeable difference in starting up the engine from cold as well.

In all, I spent $11.xx and it was wroth every penny. I urge anyone with a corroded ground wire to just go ahead and changie it out, it is a very simple job, and it will definitely improve battery life, improve engine start up, and possibly resotre a little lost horsepower.