@James, I think that's another kit, as mine hasn't the battery in the board. I think mine was the first retrofit kit ever made for the Polysix by Korg USA in 1986, and your docs looks like they are from 1999. Here are the pictures: http://groups.yahoo.com/neo/groups/PolySix/photos/albums/912066063
Thanks for the link anyway. Still looking for the installation procedure.