Where to place speakers (work/study room)

I’m wanting to put 2 speakers in my study / work room. It will mainly be used for background music (no gaming / party / critical listening).

Intention is to place them such a way that it fills the room and both occupants can enjoy them.

Any suggestions. Have marked few places where it’s possible to easily keep them.

Speaker : Polk ES15 running via Denon X4800H (Zone 2)

Appreciate any suggestions.