Could use some advice

So, I have discovered paracord to be one of the coolest things on Earth, quite literally. I have been working with it doing dog leashes for awhile but there is something thing I have not been able to get a handle on and I really hope someone can help me out.

I just can't seem to attach an O-ring (or a send snap hook) to the end of a leash without it looking...just horrible to say the least. I don't know if my dumb fingers have just gotten used to doing it the wrong way or what, but I just can't make heads or tails of it. What I am looking at doing is making the handle adjustable like a slip-lead, so the handle doesn't come off over the hand, but as I said before, I can't figure it out. I have only seen one other leash like it on a website.

http://www.survivalstraps.com/pets/paracord-dog-leash.html

It's driving me nuts! Is there anyone that can help me out with some advice on where to start?

Thanks!

EDIT: I forgot to mention that I am using cobra knots.