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How big of a job to replace battery cables?

So my 2012 Jeep JK was a salvage flood vehicle. I haven’t really had any issues with it electronically but my battery cables are needing to be replaced. I’m a self made YouTube mechanic and can typically find what I’m looking for when I need to work on something or make some type of repair but I’m not finfomg any how to videos on YouTube to replace my cables. How big of a job would it be to replace both my POS and NEG cables? I took a leak the other day but couldn’t seem to find wher the cable ends ended. Seemed like they were somewhere behind the motor or something? Anyone help me out?

It shouldn't be that bad. The way I judge that type of job would be to pull up the parts diagram, identify which leads you'll be replacing, and see how long they are and where they go. I replaced the headlight harness and it wasn't bad at all. It reaches from the TIPM and attaches in a few spots, across the radiator, and out to the turn signal on the fender.