Just a guess, I would push the edge of the plastic cover at that line on the body at the 10 o’clock position. That’s how other wall mounted CD player open. It may open where you push the edge of the cover or it may open directly opposite at the 5 o’clock position.
It seems that it’s tilted off center - if the line on the body at 10 o’clock was rotate to 12 o’clock the warning label would be aligned parallel with the ground.
Just as a parent can love all their children, regardless of the various strengths and limitations of one not shared by the others, Audiophiles can, and do, love all their high quality audio sources.
I love my vinyl records… and I have a great Rega P8 turntable with fantastic cartridges, etc.
I love my CDs… and I have a superior Jay’s Audio CD Transport that brings their content to life.
I love my Streaming and DAC… and I have the terrific Chord Hugo TT2 DAC and super capable SOtM network streaming for flawless high res playing from Qobuz.
There’s never been a better time to be an audiophile.