I am pretty sure those extra shoulder buttons on the back are the release levers for the joycons. I think the joycons attatch magnetically, but which also activate locking hooks. Otherwise people would be accidentally detaching joycons and the tablet portion would fall and break. Nintendo designs hardware to be kid friendly, so there is almost certainly a secondary attachment mechanism in addition to the magnets.

[–] Mr_Dr_Oink 4 points 1 hour ago (2 children)

I was talking about these buttons. And in terms of locking in, thats a possibility but a strong set of magnets with a recessed area and a connector seems like it would be quite secure.

[–] [email protected] 1 points 25 minutes ago* (last edited 20 minutes ago)

Ohh that makes sense!

Now that I am looking at it again, I wonder if those buttons you circled are actually little plungers that push the joycon away from the body to help release it.

Edit: Whatever way they attach, I hope the new joycons don't loosen and flex like some of the current joycons do. Some of my joycons have "wobble" when attached and it makes me sad.

[–] [email protected] 2 points 59 minutes ago* (last edited 58 minutes ago)

There's a little square recessed area on the bottom of the pink part, which I just now noticed. Might be some kind of locking mechanism?

Or it could be for the strap portion.