I figured out how to make the Mosquito AI attack the ships and many other things and ended up re-writing the whole lua script which rigged up all the guns properly (one was firing but the tracers came from middle of the ship).
To get the AI Mosquito to attack, I added the value "Destroyer". (I would have thought "Armed Ships" would have been enough ... the fact it's not is likely a bug)
I updated the ME icon reference to identify this as a Destroyer (DD).
I corrected the ships dimensions and top speed.
I used EDM to identify all the connection and animation points, corrected the resting angle of the rear cannons.
I used core weapon definitions, everything is period except for the 150mm cannon, I substituted a 133mm cannon as was done on the Bismarck.
Torpedoes still don't work.
On thing I noticed is that all the 20mm AA guns are twin barreled if not quad, but in reality the Z39 had the quad 20mm but the rest were single. The Z39 was one of seven Type 1936A (Mob) destroyers. All seemed to have different configurations and none match the full complement of twin barrel 20mm AA. Anyhow, I took the liberty of changing the display name from "DMS Z39" to "DMS Type 1936A (Mob)" (although the use of DKM / KMS can be debated).
The modified Lua is linked below
DKM_Z39.lua