Replaced NSS switch/wiring.ballest resister.voltage regulater.alternator now what???

Battery cables are pretty old and we have been thinking about replacing them and we will as soon as we can. Today we just installed the new alternator and got the battery fully charged so thats not the problem. Tomorrow we will check on the bulkhead connector if we can find it. Can you describe where that and the fusable linkage is. Still haven't gotten around to getting a manual even though we know it is mandatory. That is our first priority before buying anything else for the car.