Most likely the battery cable is ok. It's the smaller wires that have bad insulation. A few dollars for wire and a little soldering and you can DIY as I did. But you have to do some connections from under car. You don't need a lift, just a couple of jack stands under the front. Connector [photo 3] uses pin connections to wire. De-solder and reuse them.

Photos 2 & 3 at end of thread are of cable through grommet at oil filter and connector [to its right when facing engine].

Oil level = Brown/Black [left side, front, bottom of block]
Oil Pressure = Brown/Green [left side, below oil filter]
Solenoid = Purple/White [on starter]

PS Good to disconnect battery when messing with B Harness.

PPS Replacing the positive battery cable is a PIA because it runs from driver side to passenger side and is covered by all the plastic mouldings. But if you're going to do this cable you might as well R&R the windshield wiper assembly to clean & lube and do same to climate control fan motor. And replacing the thin plastic vac tubing is also a good idea. Been there, done that.