Have No Power help!

I was poking around with my volt meter today and i found a few things. When i first checked the alternator stud it had only 6-7 volts with the key off. When i turned the key on it had 0. So i thought well the ignition switch is bad. I checked the switch with the key on and turn over and it checks out with about 4.5 ohms continuity between the Batt post and all the others. So i dont think its the switch. I then decided to pull the whole dash and poke around. Of course i unhooked the batter first. I then bolted the big black wire from the ammeter and the red one together to bypass the ammeter. I checked the ammeter for continuity at the same time and it had about 4.5 ohms across. Let me know if these are ok #s please. I checked voltage at the ignition switch and i had nothing? I then checked the big red wire and i got only about 7 volts. I am really confused at this point. I checked the fuse box and realized that a wire that is hooked to the first fuse terminal on the right was unhooked at the bulkhead connector. I figure it pulled lose when i messed with the speedometer cable. Is that the battery feed to the fuse box? Could be a big problem i figured. That could explain why my radio is not. working either. I obviously have a problem at the bulkhead connector so i unhooked the bottom one with Z fusable link. I discovered that the connector was burned and cracked. It fell apart when i took it off. I guess i found my main problem. My question is how do i fix it? Can i replace the spade and a new fusable link? I did notice the alternator bulkhead connector where the big black B+ wire goes in was also burned. I would like to know the easiest cheapest way to fix this problem. I just want the car to run again. Thanks!!