Sea Ray

I have a leak in the aft cabin of my 2018 SeaRay 400 Sundancer (see photo). MarineMax has removed ceiling panels and we had many rain storms with the shrink wrap off while on the hard without any leaking. No water or pink antifreeze leaking while commissioning the water systems.  Of course, after splashing and running the boat on plane, water was noted leaking on the port and starboard ceiling of the aft cabin.  So our best guess is that rain water is getting in somewhere, trapped forward, and runs aft port and starboard when on plane. Where is it coming from???  We have checked seals and drains on hardtop sunroof and the calk on all joints looks intact with minimal dry rot cracking. Have been troubleshooting since last season, running hose water starting low and working up without reproducing leak. Only other place we have noted water marks is on the bottom of the fuse cabinet next to the helm. Has to be coming somewhere high and running low….   Have anyone had this problem and found where it’s coming from and how to fix?  It has been suggested to remove every piece of hardware and recalk, but can’t reproduce where the leak is coming from and removing cleats and bow rails would be major work and may not solve problem.  Please Help!  Thank You fellow boaters!