Bevel gears?

[motoxer4life]

I dont know if you can really tell from the pics but these are the bevel gears that were out of the front of my buggy. They are all chewed up like they werent meshing with the diff right and there was metal shavings inside the diff case. Basically, they were very sharp and would make grinding noises and stuff when i would go. I know i need to shim the diffs but im not sure exactly where to put the shim. Anyone know exactly?

Thanks