I have a similar deal in my family room. I use floorstanders, but made 2 modifications to a wall unit which otherwise - I suspect - is pretty similar to yours.
1) I hinged the face of the portion of the wall unit that is directly in front of the speaker (i.e., it is now a pair of doors).
2) I put the speakers on a pair of "slide out" platforms - similar in concept to the mechanism on which your dresser drawers ride.
For more critical listening (rare on this system), I open the doors and slide the speakers forward app. 1 1/2 feet.
You might do something similar (like a telescoping arm), especially if the bottom of your monitors allow a screw in support for stability.
Good Luck
Marty
1) I hinged the face of the portion of the wall unit that is directly in front of the speaker (i.e., it is now a pair of doors).
2) I put the speakers on a pair of "slide out" platforms - similar in concept to the mechanism on which your dresser drawers ride.
For more critical listening (rare on this system), I open the doors and slide the speakers forward app. 1 1/2 feet.
You might do something similar (like a telescoping arm), especially if the bottom of your monitors allow a screw in support for stability.
Good Luck
Marty