That was done with the old Devcon 30 min two-ton epoxy Grady. New stuff they sell these days isn't so workable, but still usable. Flowed the epoxy out using a heater.
Hey, you're correct, that arrow holder attaches between the upper fade and limb. I learned real quick that you can hang a bow on a tree while in a stand but no way to hang an arrow with it. This way the arrow stays with the bow at all times while hunting. I think you'll like it also.......Art B