But that's a pretty far reach; how would Castro even know Oswald was in Dallas that day? There's no evidence of any communications between him and Cuban officials. Where's the evidence for this connection?
Although I agree that we haven’t seen much evidence, and most likely never will; I don’t believe that it is a “far reach” to believe that Cuban intelligence agents would have been keeping track of LHO. After all, he made quite a scene when he visited the consulate in Mexico City. Latell writes that Castro was very much hands on leading the DIG and was immediately made aware of all important items. And that he would have unquestionably been made aware of the LHO visit. Therefore, Castro likely knew where LHO was and that JFK was in the motorcade in Dallas on 11/22/63. So to respond to your question, I believe that, at the very least, Aspillaga’s account of the radio antennae re-direction is credible evidence that Cuban intelligence (and most likely Castro) was aware.
Did Oswald read these? Was he aware of them? I think so. But did they motivate him to act in response?
I believe that the defiant “communist salute” by LHO at DPD shortly after his arrest is evidence that he was motivated by those reports. And also most likely he was motivated by other antagonistic domestic speeches by Castro that fall that he heard on his shortwave radio.
How did Cuban agents know Oswald moved to Dallas? Was working there? Why would they even care about some oddball who made threats against JFK but was, according to the accounts of the Cubans there, tossed out on his rear end. Again, Azcue reportedly forcefully threw Oswald out of the consulate and didn't want anything to do with him.
By the Cubans accounts, Oswald came across as a crank, a misfit that they wanted nothing to do with. It simply doesn't add up to me that they would somehow track his whereabouts. When he went back to Dallas he laid low. How would they find him?
And Oswald put a New Orleans address (4907 Magezina (sic) Street address) on his transit visa application. I can see that if he put Dallas as an address that would help keep track of him.