Starter wire issue

[pursuit2460]

Took the boat out over the weekend. When I was getting to my destination the boat just suddenly stopped. Got it towed back in and back home no issues. Started feeling around the starter and I felt some burnt wires. Took off the riser and the manifold and sure enough the main positive cable was loose which I guess created enough heat to burn out the 90 amp fuse. Now correct me if the wiring was hooked up correctly. 90 amp fuse, burnt, had a orange and red wire connected together to the small terminal on the fuse and was the first on the main terminal. Then on top of that was the main power from the battery and a 2nd wire that runs to the trim/tilt unit. A yellow/red stripe wire to the terminal closet to the block. The other small terminal, opposite side of the yellow/red stripe wire, had nothing connected to it. I also found a negative wire that goes connected to the back of the alternator was just about completely broken. I did notice when going out today that the charging voltage was a bit high around 15.7 to 16 volts, but eventually settled down to 14.5. I ordered a new fuse and want to make sure that the way I took it off is the same way that I need to reinstall it. I'm hoping that the ECM didn't get fried because of the overvoltage and the loose wires. 2000 5.7 TBI L635326