No I mean the whole plausibility of attacking a embassy in poor ass Cuba with high end secret weapons for no discernible reason other then to irritate a few spies and risk a serious international incident that would probably result in heavy handed trade sanctions, confiscation of top secret equipment and people being kidnapped and threatened. It's like starting a mafia war no one wants to do it. I could see it in the 1960's maybe, when there were a ton of wars (with no predictable outcome) going on in South America and they wanted to put nuclear missiles in Cuba. With submarines the weight of nearby missile threats is much less so its not as crazy for now.
But how would you do this? Put it in a van and risk it getting stopped or investigated? Putting heavy equipment in a nearby building that can get easily broken into and investigated? There would probably be very easy to see suspicious signs of weird sonic transmitters. I mean what are you gonna do, have every traffic cop in the city on your payroll?
There is not many places you can put it on. A boat, in a building or a risky van. I am pretty sure someone in those apartments would complain. I guess you can have a comical submarine that raises a transmitter. The guards at the front post are gonna be eyeballing big vehicles real heavy.
This is what you got there:

So you can either use a boat/sub, do drive bys, rent an apartment, hide something in the government memorial or use the unknown building (Can't figure out what that thing is)
The apartments are just stupid to use because counterintelligence can rent a nearby one or figure out that its being watched/locked out for some reason and they probably already monitor it, and its really easy to break into residential housing or at least loiter nearby.
drive bys - risk getting stopped by traffic cop or having the CIA crash into you with a dump truck to cut your terror van in half. good luck proving its not just a intoxicated construction worker. Everyone including your mother thinks vans are mega suspicious
hide it in public place/memorial - seriously doubtful
submarine/boat - sounds insane
unknown building -anyone know what it is?
use some kind of robot to attach itself to building - also crazy and it can get captured really easily if spotted
I don't know the range on such things, I guess maybe you can also put it in a far away area that has line of sight if its really focused but the reflector would probably be obvious, or maybe a helicopter or drone
maybe you can hide it in the sewer and use the buildings pipes or have ssome kinda antenna pop out of a man hole, if that area even has sewers, when no one is looking
