Leaky flood table

Just setup my flood table and it seems to be leaking from the bottom of the fittings. Any ideas how to stop this. Botanicare 3x3 table setup on saw horses with Botanicare fittings. Its coming from the under side of the fitting. I put the rubber washer on the underside if that makes a difference? Should it be on top side in the tray?

If it's from the screw on female to the male stub try to add plumbers tape.

Does the tray have to be tilted a little?

Actually the rubber ring is supposed to be on the inside.

I switched the rings to the inside and it cut down the drip alot. I still get a little leakage in the same location. You think a little plumbers glue?

Silicon it.

** mic drop **

Black plastic roofing cement.