Lol my 1.5ton HF jack lifted an EcoBoost f150 and sounded like it was dieing. Popping and cracking left and right. Sadly we were in the middle of moving and a buddy that was helping me hit a bolt in the storage area and popped a tire and it's all we had for a jack lol
The slots are for cleaning and should always go the way those are facing. If you think about it, facing the other way would just cause everything to get packed to the inside of the slot.