where is the Alternetor Location?

[Frodo]

You need to remove the passenger seat to get things rolling. You can start here:

http://mike.focke.googlepages.com/replacingyouralternator

There's lots of discussions in this forum---use the "search". Here's a couple to get you started:

http://986forum.com/forums/showthread.php?p=174859#post174859

http://986forum.com/forums/showthread.php?t=19066

If you're going to do much work on your Box, you should consider getting a shop manual!