I'm probably the last person to figure this out as it's so obvious.
I've always found lifting the WDH off and on to be a bit of a chore. Heavy and somewhat awkward to hold without getting greasy hands.
I saw an article in a trailer magazine that showed a metal handle that allowed for one handed carrying. I used rope and a piece of plastic pipe as a handle. I was delighted when I found that the attachment point was also the balance point. It allows for one-handed carrying and even insertion. Perfect. The handle just rests under the coupler when in use.
Yah, yah, I know the rusty can isn't quite up to the level of the rest of the trailer.
But its done the job for a long time and when not in use there it goes on the coupler lock.