The first map is pretty much unit identifications.
The second map: Warten auf Inf der 19. Armee bis zum Angriff is “Waiting for the Infantry of 19th Army to commence it’s attack.” Although it sure looks like Soviet 19th Army is already attacking.
The third map: 26. Armee eingeschoben. (Leztr 3. Ukr Front - 1. Front) (Armee aus 14. 2. B P, 23. 2 * 3 Ukr Front) is an intelligence summary that Germans believe the Soviets have inserted 26th Army into this sector. 26th Army was last confirmed as being in Malinovsky’s 3rd Ukrainian Front in Hungary on February14 but lost contact with it in that sector on February 23. They believe the Soviets have shifted it north to Pomerania.
This is consistent with what is happening across the eastern front. As the entire front narrows as the Soviets move west, some of the “Fronts” are squeezed out, and their commanders put on the shelf. Examples are Govorov’s Leningrad Front and Yeremenko’s 3rd Baltic Front. But the armies are made available to feed Konev, Zhukov and Rokossovsky’s forces for the final assault.
PS: My bad; Malinovsky commanded 2nd Ukrainian Front northwest of Budapest. Tolbukhin commanded 3rd Ukrainian Front from southwest of Budapest to the Yugoslav Border. Among the pecking order of Soviet generals, Malinovsky stands higher than Tolbukhin. I’m guessing that stripping Tolbukhin of his units is the Stavka’s way of telling Tolbukhin he’s not going to “liberate” Vienna, but instead it will be Malinovsky.
I almost - almost - began to feel sorry for the German dogfaces in the East fighting desperately for survival, but then I read the story about the Germans murdering the wounded American colonel left behind and the feeling went away.