back of the wii classic controller

[CaelestisMiles]

What the heck are the little slots for?

 

[Maximo]

some think they may eventually release a rumble pack although as of right now they do absolutely nothing.

 

[Smurfette]

It's in another thread on here but Nyko is going to start selling an accessory that lets you hook your wiiremote to the back of your classic controller.
www.nyko.com/nyko/products/?i=112