Projectile Arrow falling down wall


I have the same issue as this post here Projectile across multiplayer problem - UE4 AnswerHub but i’m struggling to see how this was achieved, does anyone know the best way to fix something like this as he has described in the answer?

I have found an answer, all I did was on a hit the server got the hit location in world transform and I told it to multicast it to the clients so that the arrow would be in the same spot on a hit.

You need to have the Server send out a multicast message to the clients that the arrow’s hit location is x, y, z. The Clients then need to receive this information and put the arrow at the hit location.

Thank you for your help, however I’m struggling to see how this is achieved. I attached an image of what I thought you meant but it doesn’t seem to work.