I opened an Apple Hard Disc 20SC to see why it wasn’t working properly, and discovered that the SCSI ID select cable (which connects from the drive select jumpers on the drive mechanism to a push-button mechanism on the back of the case) was missing. Obviously I can just set jumpers on the drive, but as this unit is a bear to get apart without damage I’d like to restore the functionality of the ID selector switch. Image linked below. Any chance someone has a spare or can point me to a source? It doesn’t have to specifically be from an Apple SC drive - I think these were fairly common across external SCSI devices. https://drive.google.com/file/d/1l4rgj0poQ-h8Tepce1NcM4j-EMSyWYmi/view?usp=s... <https://drive.google.com/file/d/1l4rgj0poQ-h8Tepce1NcM4j-EMSyWYmi/view?usp=sharing> And by the way, and some of you will find this interesting, I discovered that the drive wasn’t working properly was because it had an ICD AdSCSI ST card attached - it had been repurposed as an Atari ST drive at some point! Thanks for any help! - Bob Shuster