diff --git a/app/models/cloning/exporter.rb b/app/models/cloning/exporter.rb
index 307524dcf6..7f36b7aba2 100644
--- a/app/models/cloning/exporter.rb
+++ b/app/models/cloning/exporter.rb
@@ -2,7 +2,8 @@
 
 require "fileutils"
 
-# TODO: This class needs tests
+# Note: Documented in "Server to Server Copy" wiki page.
+# TODO: This class needs tests.
 module Cloning
   # Outputs data to CSV ZIP bundle.
   class Exporter
diff --git a/app/models/cloning/importer.rb b/app/models/cloning/importer.rb
index aa4ca2e953..e7806396fc 100644
--- a/app/models/cloning/importer.rb
+++ b/app/models/cloning/importer.rb
@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
-# TODO: This class needs tests
+# Note: Documented in "Server to Server Copy" wiki page.
+# TODO: This class needs tests.
 module Cloning
   # Imports from CSV ZIP bundle.
   class Importer
diff --git a/app/models/cloning/relation_expander.rb b/app/models/cloning/relation_expander.rb
index 51aadc73d1..cf2b7048ae 100644
--- a/app/models/cloning/relation_expander.rb
+++ b/app/models/cloning/relation_expander.rb
@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+# Note: Documented in "Server to Server Copy" wiki page.
+# TODO: This class needs tests.
 module Cloning
   # Expands a given set of relations to include all necessary related objects.
   class RelationExpander