Technically, it's a mountain with a small village
Today, there's a big ski resort
Svinec is located in the Moravian-Silesian Region (Moravskoslezský kraj) (Czech Republic)
Veselí nad Moravou (Czech pronunciation: [ˈvɛsɛliː ˈnat moravou], German: Wessely/Wesseli, Wessely/Wesseli an der March) is a town in the South Moravian Region of the Czech Republic.
https://www.geni.com/projects/Jewish-Families-from-Vesel%25C3%25AD-nad-Moravou-Wessely-Moravia-Czech-Republic/13161
Svinech is the dative form of Sviny, Sviny is a village neighboring Veselí nad Lužnicí, hence Sviny u Veselí, i.e Sviny near Veselí.