This has been a long thread topic.
I don't know if this issue was addressed,in hooking up sets?
But if you do it the old way of towing your dolly over to your kite with your tractor.
Then backing it up to the front edge,you can also make sure your hooking to the right pup number.
But if your in such a hurry you have to hook the dolly on your lead,then drive it around,and push it under your kite,in the dark of night you could hook to the wrong kite.
But of course I know you super trucker, linehaulers that practise this method would never run into anything like that.
I guess I'm just an old timer that thinks some of the older ways of doing our trucker duties are the better,and safer ways.
Coming from the old school I may be looking at this with the old idea of not being able to teach old dogs new tricks.