Resting Weights Against Hands?

I regularly do face pulls, and I am always wondering if it matters whether I have my hands tight against the ends of the ropes or not. In other words if I grip the rope halfway up so that my hand isn’t pushing the resistance does it matter?

Same question for skull crushers with dumbbells. Do I center the weight or does it not matter?

I’ve always wondered this but can’t really find reliable answers via The Goog’. They all talk about grip but not really placement.

I realize this is super trivial and won’t matter either way in the big picture but I am curious.

Thanks in advance.