Assemble the rope ladder according to its included instructions.
Lay the assembled ladder at the base of the swing set where it will be tied over the top-most support.
Loop the top length of one side of the rope ladder over the top of the swing set support beam. Leave 12 inches of rope free to form the knot.
Tie a double running bowline knot to hold it securely in place.
Repeat Steps 3 and 4 to secure the other side of the rope ladder. Tug on the ladder to make sure the knots are secure. If one side comes undone, re-tie the knot.