When I change oil, I drain though the side plug (17mm).
Then I pop the bottom cover off (I think it's the tappet adjustment
port). I clean the screen and the cover which may or may not have a
magnet in it. This is the one you don't want to overtighten. I broke
the flange off and was down for 2 weeks waiting on a new one.
Be sure you order one or two screens, o-rings, covers and plugs
instead. I change every 1,000 or so miles.