The metering orfice is about halfway up the standpipe in the center of the filter canister. Once the oil-soaked filter element is removed, a turkey baster or other squeeze bulb device is the simplest way to remove the residual oil. Poke a couple of throwaway rags into the housing and stir them around with a big screwdriver to soak up any residue and/or sludge that accumulates in the bottom of the canister.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!