Nope, no predrilled hole available. Here's a picture:
ignore the rust!
The coupler is actually fairly angled up to the frame as shown in this picture:
I don't suppose the jack would take to kindly to being mounted at an angle
but there's plenty of room behind the coupler to have a piece of steel welded and drilled.
humm, also I check out that link to the white jack Morgan. Figures, it's on sale right now and the sale goes off in two days. Could be the IRS is just gonna have to wait