The Russian Federation has not released the Soviet-era Red Army/KGB archives to the public and likely will not any time soon.

By the 1980s, the overall strategy probably relied most heavily on strategic (i.e. nuclear) missile submarines located in the North Atlantic and the polar regions. Their positions could not be anticipated, as is the case of the static ICBM missile bases which were considered first targets in most destruction scenarios.

This is, to my understanding, a purely hypothetical map put together by FEMA as the official data has not been released: https://img.4plebs.org/boards/pol/image/1387/39/1387399403342.gif This map details the suspected targets in a 500 and 2000 warhead scenario.

In Scourge: The Once and Future Threat of Smallpox, Jonathon Tucker explains that a Russian defector detailed a Russian plan to release smallpox on the United States after the nuclear assault, in an attempt to finish off any survivors. The Russians went ahead with this thinking that the US was planning the same thing.