So I was looking around some of my old photos and I found this photo I took of a Wii on display at GDC 2006

(click for larger version)

That dongle on the end looks just like the WM+ except that it looks like it's probably just the early connector for the nunchuck.  Still though, it's funny how it looks like WM+, that or I'm just bored and tired.

that's was the early build of the nun chuck which was bulkier, they made it smaller by release.

What if that was the WM+ but they removed it because it wasn’t finished in time? you never know :P

then I'm scared of what I might do after I look for their headquaters in the US.

Everyone look at the connector between this extension thing and the Nunchuk. The cord runs from the Nunchuk, into the box. It is not that the nunchuk plugs in to this extension thing, the extension thing is permanently attached to the chuk. Dahuman appears to be right