You shouldn't need anything extra. The super nova has a jamma connector that will connect the super nova to the CPS 3 a board. The super nova also has a kick harness so that you can use the three lower buttons. I can get super novas for a discounted rate, so let me know if you want one. I also have a new super nova and 1 slot board on ebay for cheap
check it out:
<a href="http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3237667447&category=3945&rd=1" target="_blank">http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3237667447&category=3945&rd=1</a>