There are many threads on ADVRIDER.COM about that topic...
I finalized my installation of a PC535 this afternoon. Be carefull when dropping your battery in. There is a cable cluster that will get pinched between the battery and the bike's frame. Simply cut some ty-rap lower the cable cluster and re-ty-rap it.
You will have to re-route the negative pole. I remove both copper pole extenders that came with the battery. You will have to grind away the plastic rivets that holds those pole extender as well as unscrew the bronze bolts. I re-installed the "left" copper pole extender to the right, and the "right" one was re-installed on the left pole.
http://www.advrider.com/forums/showthread.php?p=3833302#post3833302