If you understand how a U-shaped piece of paper with two points connected by a tunnel would work...

I'm not sure there's much more to the understanding.

That's how it's possible.

The physics inside a wormhole wouldn't be like that of the paper certainly.

After all, it's not paper and a tunnel. It's connecting two singularities in a way that gets rid of their infinite natures in a physically accurate way.

But it means you can't pass information through them. Because the information can never move faster than light and the space between these two black holes would.

At least that's what I take from EPR=EP