Most of the flush mounting diagrams i've seen in here recommend having the front of the monitor flushed with the soffit wall. I'm wonderin thou, in the case of these monitors (pls see attached jpeg) where the edges are not right angles but bevels, at which point do i flush the speakers? At the 396mm or the 421mm mark?
All input appreciated. Thank you!!

PS, The monitors are ATC110s and i will be removing the amps on the rear.