How to turn on the baby monitor ?

[Legendary Dark Knight Sparda]

Hi !

I'm stuck with the mirror riddle where you are in front of three dark hallways with handless clocks above each one of them. There's a baby monitor on the table, and there is one near the crib in the parents' room but I don't know how to take it/them and turn it/them on.

When I "interact" with the parents' room baby monitor, it says "this is the "foot" of a baby monitor " (yeah I'm playing the game in French, I'm roughly translating lol) and nothing else.

P.S : by "foot", I mean the rut(?)/place where you put something on like a statue or something.

[Dannibal]

There is a baby monitor in another mirror room that you have to pick up (it'll be in a crib full of monitors; if you haven't come across that yet, then you have not found the baby monitor you need).

[Legendary Dark Knight Sparda]

I don't remember going to that mirror room. Where is it ?

EDIT : Nevermind, I just found out that it was after one finishes the clocks/plates/candle riddle. I didn't finish it because I didn't know one had to light a candle too lol