You have to place the ball as close as possible to the left side of the railing and then aim for a hidden spot further ahead. You'll find it when you see the ball jump slightly. Once you've identified it, try to replicate the jump in a game. That's the difficult part.

I put it on the ledge and to the edge like you had it. Should I aim towards the hole or straight down the ledge

grayruby

It seems there are slight unevennesses in some places due to the court's construction. The ball bounces off these points, but only at the correct angle, so you have to take a lot of wild shots hoping to find them.