Hole 4 is an iffy for me too. I usually aim for just past inside corner of "L". Power isn't too important here as softer carries it "around" the corner just as easy as harder but with less banks off the walls.
Saying that, I usually place ball top right(in relation to monitor) and run line out 3/4ths way to the inner corner and just away to allow ball to slip past. Usually, 90% or better it gets to a playable par 2.

As for Hole 5, look closely at the blocking wall above the pad. On my screen it appears to be made up of 2 rows of 8 blocks. If you can see the segments then place finger(of hand shown when positioning the ball on mat) at the vertical joint of 1st and second section/column. This will have the ball at top of mat and about 1/8th from left. I almost always use the finger to set the ball.
From here extend dotted line to right of blocking wall until end dot is horizontally even with corner and about 3 dots away form corner(having a 2 dot space between corner and end dot). Swing away for a 1 bank hole in one. If the ball goes right of the hole after first bank simply adjust end dot slightly closer to blocking wall instead of corner.

Hole 6: Set ball at lower left corner(in relation to monitor. Place end dot center of right vertical board and about 2.5-3 dot space between board and dot. This will be 3 banks to hole.
If ball passes below hole then move closer to wood with end dot when aiming at first.

Regards,
Lobo-hotei
lobo