I got you. If I am just using the glue on broad heads, I also insert a dowel of the right size into the point end of the cane and then taper them just as I would a wood shaft. You can see my plugs in the end of the nocks, where I am going to cut in self nocks on these, but could taper them just like wood shaft and use a glue on nock.
Another alternative is to use the glue in point inserts with the point taper on them up into the cane. You can buy those for most any size aluminum shafts and do them that way, and get a little more weight forward as well. If you need, I can get you a picture of them.
Also 3R has the brass ones to glue in that are 100 grains I believe.
Just for your info, on these cane, I first drill a 3/16 inch hole in the center, and then drill down into the cane about 1/4" with a 1/4" bit for the collar of the insert to rest against. And when you put sinew and some shrink tubing at the end, it will not move, no matter what bone you hit..