backwards: Add ssh module

hosts/backwards/modules/default.nix

@@ -7,6 +7,8 @@ in
   imports = lib.mapAttrsToList toModulePath (filterDirs (builtins.readDir ./.));
 
   config = {
-    mod = {};
+    mod = {
+      ssh.enable = true;
+    };
   };
 }