OK, i found it (on page 2)
CUCKTARD’S ALL-INCLUSIVE INSTRUCTIONS FOR FRONTSIDE AND BACKSIDE SLAPPIES
Take photos now, or copy-paste somewhere on your phone for reference when your at your preferred slutty and slick curb.
1- HANG YOUR FEET OFF.
You are going to turn hard and help those wheels up onto the curb, so if you are going backside, hang your toes off more than usual. If your going frontside, hang your heels off.
Also, for beginners, have your front foot over the front bolts, right up against the curve of the nose.
The back foot is on wherever, but maybe not on the end of the tail. You’re not going to lift the nose.
2- GET LOW
It helps. Especially with variations. Bend those knees, do not straight-leg it. You want to be stable and surfy.
3- GO STRAIGHT AT THE CURB (or almost straight)
This is just for the beginners. After you get the hang of it and your confidence increases, you can go at a lower angle. But going head-on into the curb will help you get onto it, so have your bodily mass heading into it.
4- CARVE
About a meter/yard before you hit, carve hard into the direction you wanna get on. Your board should be between 60-45 degrees to the curb at time of impact. Your body weight should be well inside the turn, and you should be cranking down hard on those toes or heels.
5- DON’T SLAM THE BOARD
This is the most important point. And one that people make the most mistakes with. Slappies are actually kinda delicate, and a pretty smooth feeling trick once you understand this point.
As your front wheels hit the curb, you have to lighten your front foot, like when you nollie bump a crack in the pavement. You let the board bump up onto the curb, and then do the same with your back foot, as you push it into place. It’s a very quick and subtle unweighting of front foot-back foot.
You never straight-leg slam the board into the curb.
****if you don’t twist enough into the turn, your back wheels won’t bump up. You have to twist your body so that your shoulders and hips are in line with the curb. This is usually easier frontside (probably because fs grinds on as a mini are like this, but with bs you can stay open to the coping). On a slappy, you gotta fully turn your whole body so that the back wheel gets on****
6- GET IN THE BACKSEAT
With your front foot so far forward, you may find yourself weighting the front truck so much that it catches on the grind.
As you get that back truck on, scoot the whole board forward underneath you, get your weight back of center, and grind
7-ENJOY THE RIDE, DISMOUNT IN YOUR PREFERRED STYLE, AND UTTER “PRAISE BE TO LUCERO”