[Yukon Jack]

The fusible link on my trucks goes from the positive battery cable lead at the battery to a block located on the passenger inner fender - it is a pigtail off the cable lead. Usually pretty obvious when the fusible link burns and it is a likely culprit. I guess it is also possible that when the old batter went flying, it broke the fusible link rather than the link burning.

For electrical questions I've found the guys who visit the electrical subforum are very helpful so might want to get his question over there.