nobody said...
[So far I've read it twice and still can't visualize it. Could you please post a photo if you have one?
Nup. If I had one I would have posted it. I agree it sounds confusing.
Effectively what I had was a flap of tape on the end of a flat batten. The 'flap' bit is folded back onto the batten and the batten inserted into the pocket. When you pull this batten back out of the pocket, the flap is meant to hook the broken bit of batten and come out together.
If you can't visualise it, get some tape and a batten and try everything. You'll get there