I've been playing this slap break wrong for the best part of 20 years. Many bass players also seem to struggle with this tricky line. I finally spent some time working it out by ear and this video lesson goes through my findings. I reckon this is as close as you'll get to it!
How To Play Slap Bass
If you're new to sap bass then use this simple exercise.
For more of a challenge try E Dorian Slap Groove With TAB And Notation
Here's the original recording of Lequient "Duke" Jobe playing this classic bassline on Car Wash by Rose Royce.