Yes you are welcome to use that photo.
I have many photos comparing the PCBs of the 2 Emax SE Plus keyboards I own. One unit came with an HD installed, the other not. I swapped out the HD for a PCD-50b CF card reader and it works great, and want to install the same in my other unit, so I took photos to help me figure out differences in the wiring harnesses. Interestingly, even though both keyboards are model 2100 (factory PLUS) there are different digital boards in the two, perhaps indicating at the end of production in 1990 Emu was using up whatever parts they had.
These photos may be of interest to the Emax community so maybe I'll upload them as a single zip file.
Howie