Those look like they are comparable to NS10s. They’ll do fine behind the monitors, the highs shouldn’t be too impeded. So if there is actually space back there you could possibly set up your sound space nicely. Only if there’s room back there though.
The position of your speakers could cause some sound issues.
Try making an equal lateral triangle for the best sound.
*Equilateral
Its the weekend I’ve already taken a few hits.
You will have outsmarted even Einstein if you can figure out how to put the speakers where the monitors are without removing them
Those look like they are comparable to NS10s. They’ll do fine behind the monitors, the highs shouldn’t be too impeded. So if there is actually space back there you could possibly set up your sound space nicely. Only if there’s room back there though.