Here’s a pic and a few notes on my experience on my 2018:
When draining, I caught 4 quarts each time, and put 4 back in.
The looky-level plug is in fact where indicated, to rearward of the axle.
Nothing came out of the level plug hole until I poured some in; I think the level was spot on and what I poured in basically came right out.
My vent cap has a nifty if unnecessary hose clamp on it that was biatch to try to pinch while putting back on. Until I figured out the clip-stop deal that keeps it unclamped while installing (as shown in photo). Doh!
10 mm hex for the level plug; 3/8 socket drive with a knuckle and extensions made it easy; had the van on ramps do didn’t take the front wheel off. (Driveway has slight slope and I used blocks under rear wheels to level out)