I actually hook mine on the other side opposite the quick link. I use a bigger carabiner than some so it slides easier. YMMV but I have a few reasons for this. I have had a few episodes where on rough bark trees or those with limbs where (when attached behind knot of quick link) the rope will hang up, and then you have to back up 20 feet from the tree and pull extra hard to overcome the friction of all that rope around the tree. If you put it on the other side, on straight trees the rope will fall down the tree once enough slack is introduced, and at worst the rope has to pull through the quick link, which is minimal friction. My only concern is a tight crotch that might catch the quick link after the rope is pulled out and I'm tugging on the tag end. I've considered JRB's exploding hitches to avoid all of this, but I'm not big on tying things because I'm notorious for forgetting even simple knots and hitches.