Amazingly despite many requests, I can't find this information anywhere. So
here we go:

8 Pin Mini-Din Plug (Apple serial defined below)
-------------------


1   HSKo    Out
2   HSKi    In
3   TXD-    Out
4   GND
5   RXD-    In
6   TXD+    Out
7   nc
8   RXD+    In

solder view (or socket view)

           1   2
           +   +

        3+  +4   +5

           + + +
           6 7 8



Molex 10 pin connector.

(Top of card) (red wire usually goes here, into Molex 10 pin, not folded).

1  2
3  4
5  6     (edge of card)
7  8
9  10

Note: This is my own interpretation, not 'correct' but just as a guide to
where the wires go.

Molex - Socket

1       4
9       5
8       3
2       1
4       2
6       8
3       7
7       6

No connection to shield as far as I can trace.

Hopefully these are correct!

Richard
-- 
Apples of various varieties - currently eMac/G5/PowerBook and ancients.
Carstuff - Supra and New Beetle, and happy with just two for once.
Music stuff - http://www.dmc12.demon.co.uk/music/ - MP3s coming soon!
Otherstuff - http://www.dmc12.demon.co.uk/retrotech/