Radiator

Lol well last week I put new chassis battery and a set of 6 v golf cart batteries. I did this so I could get the rv started to take it to get my onan generator running. After warming the rv up for a while I noticed a small puddle of antifreeze. I couldn't find leak exactly but it had dripped down through the holes of metal brace directly below radiator. It wasn't leaking anymore (and its 10 degrees ) so I drove the 20 minutes to auto electric place. Reservoir still at cold mark. I'm puzzled. You folks have any thoughts?

Ps I also managed to buy a nice used master tow dolly today but if things keep going like this my camping this year is gonna be a nice mix of flying j, Walmart, and other boondocks places haha. I'm not even sure what the bill is gonna be for the onan!

Thanks all for letting me vent.