Sounds like you’ve got it. It’s really
You first want to line up the white tab with the two black lines on the heel piece, that is usually real close to the sweet spot.
There’s some other threads here on ns that can go into greater detail on fine tuning them after they’re close.
In reality yes, you put your knees at risk. But it’s not rocket science and my local shop has messed it up big time so I’ve been setting mine on my own for years. No issues if you just pay attention