What the hell is this?

[soera]

I found this plug today. Each of the 4 ends says something different: Nintendo, SNES, Sega, or Sega-C.

I cant figure out the exact use of this thing though.

[ffxik]

It's part of one of those 3rd party modular power supplies.  That lone end probably ran to a power brick that you then used to power one of the aforementioned units.  Something along the lines of RetroDC

[soera]

Ahh that makes sense. I can picture it now.

[fazerco]

It's part of one of those 3rd party modular power supplies.  That lone end probably ran to a power brick that you then used to power one of the aforementioned units.  Something along the lines of RetroDC

Yep, i had one.