International 4900 Dead DT466E

I have a little day cab international 4900 with the dt466e out of Pepsi. I had the truck in running condition but it had bad batteries. I pulled them out and swapped brand new ones in a few days later. All the connections and jumpers are good and set to where they shoukd be. One small problem being that the truck will turn over but not fire, and while trying to find the reasoning (likely a blow fuse), I discovered that the positive wire from the alternator was blown out of the alternator with the stud in tow. Upon replacing, the exact same thing happened. Any ideas?

Looks like my ECM is getting power from the 40A fuse in the battery box. Any common places to blow and casue this?

 

Just an update: I moved the truck inside and am finally gettinga chance to look at it. Im used to the old mechanical trucks that I could get running without a battery within a matter of an hour. Is there a way to completely bypass truck systems to just get it up and running? This is a yard tractor so im not worried about lights, radio, etc