Moisture localized to one place.
Hello All...In the attached photo you will notice moisture about the aft end of my lead car track. The rest of the deck was dry and it had not rained for 48hours. I am looking for suggestions or comments on the root cause and probable solutions. In anticipation, thank you. P Milo.

It is likely that the track is hollow, and has collected water inside at the aft end. Remove the aft end stop, and drain the water out. Before putting back the end stop, make the connection against the track end untight, for example by putting a narrow strip of plastic, open on the lower side between the surfaces.

Check if you can find the leak forward, and seal it. Could it be the fwd end stop?

Kind regards

Lars