Here is the tech on the mini-battery install by boule'tard:  http://suzukisavage.com/cgi-bin/YaBB.pl?num=1259644714

I used the same strap steel that he used.  My welding skills weren't refined (first time and all) so instead of trying to weld threaded steel to the bottom, I inserted two carriage bolts through the holes and I used nuts and a washer with an inner diameter larger than the square key on the carriage bolt to tighten it down, effectively punching the square shape into the metal.  I also only created three sides.  I did it the hard way:  I welded three L-shaped pieces together.  You could make a U shape and simply weld an additional L piece onto it to make the front of the bracket.  The back part I left open, and I use zip ties to hold it in.

A couple of notes:

-Clearance space is very limited.  You need to be precise!  If You use the carriage bolt method, you will have to grind the tops of them down pretty far.

-In the article, Boule'tard had to extend his wiring.  If you don't want to do this, you can rearrange a few things and use the stock wiring.  I mention in the article where I moved my ground wire to.

-You don't need any fancy cutters or angle benders like he used.  All I needed was a vice, measuring tool, sharpie, and a BFH!

-To protect your battery from vibration, I recommend wrapping in strips of rubber.  The easiest source I could find were bicycle inner tubes!  You can slip them on over the posts of your bracket or wrap your battery...  The only limit is your imagination !

Hope this helps.