FYI, not all SEGA 16 adapter harnesses are the same. I have some SEGA factory adapters and they won't work on Pre-16, but will work on A & B. I have another adaptor an RGVAC member made and it seems to work on all of it. Go figure. Personally, the SEGA factory adapters are very nice and come with extra functions, like volume and CT mode, etc.
Scott C.