It is a 2002. My big fat fingers got in the way.
I sent e-mails to Intense, but no reply.
If I recall correctly, the upper link on the 2002 model was a one-piece link (although it could have been the 2001 model that had the one-piece link). You can't reposition the one-piece link. The later ones came with a two-piece link setup (two plates).
To swap the links, you simply swap them - put the right one on the left, and the left one on the right side. Basically, you're moving the shock mount closer to the front triangle for more travel or away from the front triangle for less travel.
If you increase the travel, you've essentially increased the leverage on the shock. As a result, you'll need to increase the air pressure. However, you may find that depending on the year of the shock that it may tend to blow through the travel a bit more even with higher pressure. Try it and see if you like it.
By the way, 2004 was the last year of the SLX. That was and still is a very good frame when the bike is set up properly.