I thread the loop through the spool like this-see 5:21How do you clip if off so that it doesn’t come undone, or you lose your double ender, while it’s in a pocket/clipped to a D-ring?
But BEFORE I thread it, I attach the SMB midway in the loop.
I'm not DIR so I'm allowed to have a right hip D-ring. That's what I clip the assembly to.