better 'related' sections for source and locals blocks

website/pages/docs/from-1.5/blocks/locals.mdx

@@ -17,3 +17,9 @@ your Packer configuration.
 
 `@include 'from-1.5/locals/example-block.mdx'`
 
+
+# More on variables
+
+- Read the [full locals](/docs/from-1.5/locals) description for a more
+  thorough read.
+- Read the [variables guide](/guides/hcl/variables) for more examples.

website/pages/docs/from-1.5/blocks/source.mdx

@@ -26,9 +26,3 @@ builders](/community-tools#community-builders).
 
 Note that it is possible to set source fields at the moment of using them in the
 source block of a [`build` block](/docs/from-1.5/blocks/build).
-
-# More on variables
-
-- Read the [full variables](/docs/from-1.5/variables) description for a more
-  thorough read.
-- Read the [variables guide](/guides/hcl/variables) for more examples.