Hi Tomlee,
You indication were more than useful. I found immediately the A0, A1 and A2 jumpers and put one in A2+A1, which gave me the ID 6 I wanted. I could have tried lot of time on this, as the SCSI IS selector on the case was connected to something at the back on the drive, while those Ax jumpers were on the middle of board of the drive.

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The A0 - A2 jumpers are sometimes reproduced in larger .1" spaced jumpers at the end of the drive. In other words, they are sometimes present in two locations.

So the connections to the jumpers on the end of the drive may have been on the right track. If it was not working, the problem was probably one of two:

1) They connected the SCSI ID Switch wires backwards. There's a common side and a select side (or pin) to the jumpers. If you put the common side of the switch on the select side of the jumpers and vice versa, the switch does not work. I think it selects 0 or 7, but my memory and reasoning facilities are hazy on that.

2) They connected the SCSI ID Switch wires to the wrong jumpers. There's not much you can do about this, unless you have a manual for the drive which will identify the correct jumpers for you.

My guess would be that they connected the switch wires to the correct jumpers but installed them backwards.