CombatJack, there are a couple of options available.
First you can get the loop that attaches to the end plate area, that is what I use and love it!
Second, if you have the plates you can use an Uncle Mikes quick detach system swivel. I have that on my tactical shotgun set up from Mesa Tactical and absolutely love it there.
There are limits to anything you do. For example, using the QD swivel will move the center of gravity forward somewhat, some people don't like that, but it is good for others. Your choice.
I was initially concerned about the strength of the loop system I have, but was reassured and I've since "tested" it and it is plenty strong. It is easy to install as well.
The paracord method, while it works, is not something I would think of along the "perm" set-up. It will work I'm sure.