WP, You wrote:
"Not quite, the picture you are remembering is the install of the Mk 10 set."
No, I was referring to the illustration (as noted by George and described by the author as tentative) that appears on p.133 with the lower illustration showing how the scanner unit package was installed in the nose of those Mossies so equipped e.g. 23 & 141 Sqns.
IMO, with the a/c of these two squadrons also equipped with Gee, the author's tentative view is a logical one because with the Gee display mounted in its usual position (behind the pilot's seat), there would be precious little space elsewhere to fit the Monica display where it could be readily monitored. If you've ever had the opportunity to sit in a Mosquito cockpit you'll know exactly what I mean
.
Again and IMO, while it is interesting to speculate on the cockpit installation of this particular system based on published information, it is likely that the only definitive information would be that provided by the relevant Air Publications if indeed they still exist.
Dave