Hi,
We pull ringos, knee and wakeboards with our sibs. Despite extra strain on transom we space the towing eyes high and wide for better towing.
M8 eye bolts on the Aerotec;
M6 u-bolts on the Zodiac;
A decent bridle and float pulley also helps.
Close to tubes better for towing when turning as bridle less likely to foul on engine leg. Also better to be high to keep tow line out of water and bridle further away from prop. Just bear in mind high and wide better for towing but does put more strain on transom.
My Zodiac above has the flimsiest transom imaginable but still copes well towing and doesn't flex any more than when solo.