Power harness question

[jugu]

I bought a box that had some some Lindbergh Universal Cabinet accessories, as seen here:
https://app.box.com/s/25sfxn24vevpu0ekfca4om8ln3ly7umk

The box contained a few stickers and a power harnesses for Lindbergh and JVS/Naomi systems. One thing that is weird is one end of the power harness is bigger than the other end, seems to be 20 pins instead of 18. This differs from a set of cables I already had.

Does anyone know about this?

Thanks in advance.

 

[Mitsurugi-w]

Interesting

 

[jugu]

So I found the manual for a Lindbergh Universal here:
https://wiki.arcadeotaku.com/images/f/f0/Sega_Lindbergh_Universal_Cabinet.pdf

And found this in the wiring diagram:View attachment Lindy_power.pdf

But this doesn't clear much up. The two Lindbergh power supplies I have don't have 20 pins, only the 18. So how would these cables be used?