Based on the map, I'm with you that OG5 is at 7T3/U4 and Wd5 at 7H9/G10. I would argue OG4 (not B4) is at 7C9/D8 based on the image. No idea where the Brush and pond overlay go other than in the Republican set up in states 7Q7 is NA for setup so no P2 there? It might make sense to add the Ponds to 7L6, M7, N7 to keep three hexes to far bank (part of VC) and exclusion for using 7Q7 but I don't see that in the map.
Finally, The Republican setup states the MG platoon must enter on east side on 7I10, Q10 or Y10. However, either the north arrow is wrong, these units should be entering on 7I1, Q1 or Y1, or both boards need to be reversed (see Nationalist I Tabor entry hexes). I think the entry hexes for both sides should be reversed on each board but again, just a guess based on intent of VC.