You're installing a new oil$-$return inlet on a reservoir. This should be positioned so that it's

A$.$ parallel with the pump's intake and aimed at the drain plug.

B$.$ below the level of the lubricant in the tank and pointed toward the lowest point or drain.

C$.$ at the bottom of the tank pointed toward the pump inlet.

D$.$ at the top of the tank and aimed at the screen that is above the separator baffle.