Yes it will lead to the big stud on the solenoid of the starter. Remove that nut and disconnect the line. There will be one or two thinner red wires on that same stud. These wires go inside the car and the other one to the alternator.
Since these wires are on the same stud as the positive battery cable,they are always hot. Apparently the wire going
To the inside of the car is bad. Like I said earlier, once you see the wires, you need to try and get the pulled out a little to see the problem. The fusible link looks like a solid white plastic tube. If it looks melted, there is your problem. It needs to be replaced. But before you replace it , you need to figure out why it burned up. Typically, the wire may have rubbed the insulation off or got too close to the exhaust and shorted the wire. Getting it?