<Sorry, no external cases and I don't know what they are. These are specifi <to 220v 50hz. <I thought S100 style machines had drives with 12v connectors. These are older drives like the sugart sa800/850 series with line powered ac motors for the spindles. the rest of the hardware uses typically +24v, +5 and -5v. The later drives were DC motor spindles and very different. The ones you've found might fit a Heath H8/H11 early 8"disk system or an older altair/imsai 8" system. that of course is not an exclusive list. Allison