MKII PCB differences?

[grbgemen]

So i picked up a midway cabinet on Saturday for $20.  Was painted all black but i could see the MKII artwork underneath.  Yesterday i started stripping the black paint off to reveal the original artwork in excellent condition.  Since i am already in the process of MAMEing another cabinet, i decided i want to restore this cabinet.

So ive been searching around looking for a working MKII PCB.  I have found a few on ebay but they are quite different looking.  From my understanding, there is the main PCB and also a separate sound board.  There is a harness that connects the two together and also a ribbon cable.

Both listings that are on ebay have the sound board, but one has another board connected. 

Here is the klov listing:

http://klov.com/images/10/1066269597.jpg


and here is one board on ebay that looks the same:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=370040904746&ssPageName=STRK:MEWA:IT&ih=024


but then there is this one that doesnt have that upside down board.  looks like it is supposed to plug into the main PCB via those two black sockets.  and yes i know it is missing the sound harness.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=230240331258&ssPageName=STRK:MEWA:IT&ih=013


Both auctions claim they work.  I emailed the seller in the last link i posted and he says he does not know.  I have searched around google but cant find anything.  Hoping one of you who has a MKII cab can tell me.

[grbgemen]

it appears that the board without the daughter board is a newer version.  it uses 8meg ram chips instead of 4meg.