Sega-Naomi

I have an Astro city cab that i got with kof 03, its wired for 6 buttons but since it was used for a neo-geo game only 4 buttons are working, i took the neo-geo out and put in a cps 2 Sf zero to try the other buttons but it did not work, it doesn't have a kick harness so i thought that maybe all the buttons were in the jamma connector, i know NU-B , what can i check or what can i do to convert it to 6 button?

you need one of these connected to the bottom 3 buttons for each player

http://www.jammaboards.com/store/wire-h ... od_49.html

but there are 4 buttons working on the cab, do i need to disconect one?

assuming your button 4 on your cab is low kick in an SF scenaio, no don't disconnect it, simply connect both wires (button 4 & light kickfrom the CPS loom) to button 4