Interior Panel Vapor Barrier-Tuck It In At Bottom?

[Dibbons]

I have some 4mil clear plastic I'm slapping on befote the interior panels go on below the rear side windows ('72 Satellite Sebring Plus). What should I do with the plastic where it runs along at the bottom/floor? Does it just stay over the sheet metal or should I tuck it in so any drips of moisture are directed toward the little drain slots? Thank you.

 

[moparnation74]

Directed to the drain slots....it tucks inside