I found a much more detailed schematics for the SCSI traces after digging through the Forum.

See the 3 Jpegs at top of the page below.

http://68kmla.org/forums/viewtopic.php?f=29&t=19390

Check on page 2.

For Pin 20 of the SCSI chip there’s a trace to Pin #2 ( D19 ).

Same for Pin 21 to pin #2 ( D17 ), pin 24 to pin #2 ( D13 ) and other pins of the SCSI chip

I checked the Apple Schematics but don’t find these.

Where are these D references located : its always pin #2 but what are these ?

Can someone point me into the right direction ( or post a photo with a mark where it is ) ?

These are the only unchecked points from the whole list but I doubt these would yield anything.

It was posted by phreakout but I see he hasn't logged in anymore since January so sending a PM won't help much I'm afraid..

I have the socketed version of the SE/30 board.