Plane part?

[Tank Destroyer]

I picked this up at a Auction it was in with other items. Is this off a plane and if so does anyone know what plane? It seems to be made from plastic.

Marty

[Tank Destroyer]

Any thoughts?

[Watchdog]

Don't know really whether this is from an aircraft but it looks relatively modern.
As far as my German goes I would translate it as "Rear Cargo compartment Co2 connection and Lock Compartment/space".

The first part makes some sort of sense even without knowing the technical application but I couldn't guess as to how the latter phrase should be interpreted.

The mention of a Co2 connection has me thinking of fire supression systems but that is pure supposition.

Don't suppose this helps but it's a thought

Regards

Mark