Here is how i did my 0 gauge ground cable upgrade:
by Mark Sheriff
, on Flickr
here is what the stock ground cable looks like before modification^
0 gauge cable on the left vs. the stock cable on the right^
^stock ground cable pulled out and the terminal cut off, this is how you will slide off the voltage sensor.
^measured and cut the wires to length based on the length of the stock ground connector when i pulled it out, then used my hydraulic crimp tool to get the ring terminals on.
^i had to carefully sand/file the hole in the voltage sensor bigger to be able to fit the 0 gauge cable through.
^voltage sensor inline and all ring terminals on
note: you make the ground to engine block cable the same way, it just wont have a voltage senor inline.
^here is what the connections on the bracket looks like, i added an additional ground to chassis from this bracket to a factory ground point near the headlight, when you remove your battery you will be able to see two factory ground points to the left of the headlight, i chose one and connected my ground there, again that area was sanded to bare metal also for a good connection.
video showing the setup after the upgrade: