Oh, definately not! It can be the AP window for any chopper with 8 other windows available. My ....ahem...SLIGHTLY modified MD500 uses shft+9, as does my, again, slightly modified 206B III. I like to tinker, add windows and so on. it's fun

SH-60, HH-60, JH-60, HH-70, 412, etc etc Most of my choppers use shft+9. I like to keep windows the same across platforms to make it easier to add new stuff to a new bird.
Anyway, point is, designers can make any window number any panel they choose. They could as easily have made shft+9 the radio stack and shft+2 the AP. Seems like most designers stick to Shfy+2 for the radio and shft+3 for the GPS, etc etc. Makes life easier for us tyro panel breakers....errrr....tinkerers!
Any more questions, feel free to ask!
Pat☺