Obviously you have to be able to safely grab your leg rope
Your leg rope is attached to your board via a small piece of rope / cord, that is supplied and or is a single loop and or stitched to the leg rope rail saver which is the webbing
THIS LOOP SHOULD NOT BE LARGE ENOUGH TO GET YOUR FINGERS IN AND IF IT IS YOU HAVE INCORRECTLY ATTACHED IT
i see so many leg ropes attached incorrectly at a shop level and it astounds me people really dont know how to do this , i am constantly re attach them for people down the beach
The idea is to tie this rope / cord as short as possible
The first reason is if the loop of cord is long it can act like a knife to butter impacting the rails slicing and crushing them when under tension from a fall
The webbing is designed to distribute the apparent pressure over and around the rail on a fall
Grabbing this webbing is an essential tool for you to use for controlling your board from getting away from you / best done when the board is upside down and no large loop to potentially get your fingers caught in
So
Do not attach your your rope / cord around the the leg rope plug bar with a single loop slipknot you often also expose a large loop and knot on the side, this knot will also impact your rail causing damage hand fingers board.
ALL LEG ROPE / CORD
KNOTS SHOULD NOT BE EXPOSED AND TUCK NEATLY UNDER THE ASSOCIATED VELCRO WEBBING / RAIL SAVER
The slip knot is ok as long as you can make it shot enough to attach legrope / which is often not the case and your knot is not exposed.
Best practice is to use the double loop , where you simply push the rope through / under plug bar / you now have 2 loops , put velcro webbing through both loops, put knot under velcro and webbing. again some tweaks with loop size prior to are required to minimise the length of the rope / cord length to get it as short as possible
Also check this rope regularly for wear and tear stretch they are to easy and cheap to replace. When it does snap it wont be a sore finger it will be a bloody long swim

Ps ill would post a couple of photos ............but im SUPen in remote location