Black Tank leak

[67Tiger]

I noticed a spot on the asphalt about 5' in diameter last weekend while camping. I gave it the finger sniff test and turns out it was coming from the Black water tank. I crawled underneath to find some wetness at the joint where the large diameter plumbing meets the black tank, not even a drip was found but I'm concerned this will escalate into a larger problem. I'm not sure if the View is still under warranty even if it is I trust myself to fix minor issues more than I do Camping World which is where Winnebago sends me to correct problems. Any ideas or others out their that have had this issue with their RV's?