On Fri, 15 Nov 2019, Jules Richardson via cctalk wrote:
  OK, the cord "fits", but having looked at it
now I'm not at all convinced,
 either. The two-pin socket is actually the same as the four-pin socket on the
 other two machines, but with the upper two pins (intentionally) missing.
 The PSU board inside appears to be a switcher, but I'd be inclined to agree
 with Allison that it's intended to run from low-voltage AC (I've put the
 machine back together now, but just realized that I should have checked the
 voltage rating on the rectifier stage's caps). 
If somebody found a mains cord that "fits" and plugged it in with the low
voltage AC input connected to the wall, then it might not be happy now.
You might want to avail yourself of some of Allison's expertise.
Might I suggest a box of 8" floppies for XMAS?