Accuracy about the Shield Wall Explosion

I can see the accuracy for the shield wall itself. My understanding is that this accuracy is for putting shield wall. What about the explosion?

There are two questions about the shield wall explosion.
1. Since it will explode each piece, does the accuracy have penalty far away from the character? Each piece will still explode to near enemies.

2. Does the shield wall explosion hit one enemies more than one hit? Or it is just limited to one hit.

you can assume that the accuracy for the placement is the same for the explosion

don't think accuracy penalty has anything to do with how far the object is from you, but how far the object/attack is from the monster. an example is comparing it to Sunder, which shoots a far ground slam which loses accuracy the farther it travels.
in this way the shield wall benefits, because its edge pieces are closer to monsters that you're further away from.
either that or it always originates from you, the caster, and it wouldn't matter where the shield wall pieces end up

shield wall explosion can only hit one monster one time per cast

Thank you for replying. It seems I need to gain some accuracy right now. I checked poe ninja and found most people didn't do that. But I checked wiki and some test videos. That's why I asked here.