The Kevlar and elastic shock cord is tied together with a simple overhand knot.
The Kevlar is tied to the blue thrust ring.
I’d recommend notching the blue thrust ring before tying the Kevlar to it. The kit includes some thick Kevlar. Without cutting a notch into the ring it would bulge out the side of yellow motor mount tube when glued in place.
Here’s what my engine mount looked like with the instructions recommended tape wrap, before I realized that tape wrap wouldn’t fit in the rear tube!