I'm also not getting what you meant their Rob...
Well, I'm not sure which part.
I only said few things.
1) the ten no kokyu hand is like the hand near the elbow in ikkyo
2) where to fix your mental intention
3) the terms - which you explained just fine
4) and when to think about switching hands up and down as a plan b
I assume your confusion is with the mental intention part. All I can say is just try it. If you are moving your arms with muscle from side to side that's easily countered and the uke can simply let go and whack you.