I mounted a nice piece of hardwood maple on both sides of the bow of sled and used eye bolts to bring both pieces together on either side of sled bow. I then made a hitch out of rope using two length of PVC so when I stop - the sled would too. I lashed three loops with cord, two for sled eye bolts and one for hitch. Use metal clips for attachment.
Would upload photos but this site sucks for that.