Wanted to get back to you--
On the side of of the slide, up top, there is a piece of trim/mold-where the top material meets the side material---?? me saw a small gap==I mean small, kinda like your paper wide gap--between the body and the trim????
I have siliconed it closed!!!
This may have been the culprit???===time will tell
This leak caused a lot of damage under the angle iron bracket that screws to the hydraulic ram---it rotted out that board!!
Water leaks are NOT your friend in a camper--and we never saw the damage untill to late!!!
As we bought the unit used
thanks for your reply
Rocky in Corpus