Keyboard inverters/converters for terminals

Ha! I have an old external 3.5" IDE disk enclosure. It's a good enclosure, too -- Firewire 800 _and_ USB 2 _and_ eSATA. It has the internal drive from my old iMac G5 in it. The iMac suffered from failing capacitors and I coaxed a little more life from it by making its HD external. I wish to retrieve its contents. It has a very odd power connector. It's a DIN plug with quite a few pins -- 7 or 8 and a plastic locator. Unique PSU. As I have been on mandatory working-from-home for a couple of months, I took my Mac mini setup in the bedroom apart and stashed the bits away, and set up my work laptop with 2 old external screens as a home office. One ancient Eizo screen and a slightly more modern HDMI one. Snag: I failed to pack the modern HDMI screen's PSU brick away with it. This led to a lot of frantic hunting. I found the power brick, and some others. The snag is this. I now have _two_ power bricks for the external drive. Both deliver the requisite *both* 12V and 5V. Both have the right DIN plug and fit. But they're wired differently. One's ground pins are the other's 12V pins. I think this is now resolved but it was an interesting question: one brick will power the drive, while the other, with an identical connector, is more or less guaranteed to release the magic smoke from the external enclosure.