diff --git a/src/gui/ctrl/bus-controller.cpp b/src/gui/ctrl/bus-controller.cpp
index 7860d0da1..f4b5c2f17 100644
--- a/src/gui/ctrl/bus-controller.cpp
+++ b/src/gui/ctrl/bus-controller.cpp
@@ -87,7 +87,7 @@ namespace ctrl {
   BusTerm
   BusTerm::attach (ID identity, Tangible& newNode)
   {
-    return BusTerm(identity, theBus_.routeAdd(newNode));
+    return BusTerm(identity, theBus_.routeAdd (identity,newNode));
   }
   
   
@@ -161,9 +161,9 @@ namespace ctrl {
    * @return corresponding up-link for the initiating node to use
    */
   BusTerm&
-  BusTerm::routeAdd (Tangible& node)
+  BusTerm::routeAdd (ID identity, Tangible& node)
   {
-    return theBus_.routeAdd(node);
+    return theBus_.routeAdd (identity, node);
   }
   
   
diff --git a/src/gui/ctrl/bus-term.hpp b/src/gui/ctrl/bus-term.hpp
index fc2216a6d..e3847ff80 100644
--- a/src/gui/ctrl/bus-term.hpp
+++ b/src/gui/ctrl/bus-term.hpp
@@ -127,7 +127,7 @@ namespace ctrl{
         , theBus_(attached_to)
         { }
       
-      virtual BusTerm& routeAdd(Tangible&);
+      virtual BusTerm& routeAdd(ID,Tangible&);
       virtual void routeDetach(ID)  noexcept;
     };
   
diff --git a/src/gui/ctrl/nexus.hpp b/src/gui/ctrl/nexus.hpp
index a61231805..0129e3d62 100644
--- a/src/gui/ctrl/nexus.hpp
+++ b/src/gui/ctrl/nexus.hpp
@@ -99,13 +99,15 @@ namespace ctrl{
         }
       
       /** add a new down-link connection to the routing table
+       * @param identity the [endpoint-ID][BusTerm::endpointID_] used
+       *         to address the new element to be connected to the bus.
        * @return backlink for the new Tangible's BusTerm to
        *         attach itself to the Nexus.
        */
       virtual BusTerm&
-      routeAdd (Tangible& newNode)  override
+      routeAdd (ID identity, Tangible& newNode)  override
         {
-          routingTable_[newNode] = &newNode;
+          routingTable_[identity] = &newNode;
           return *this;
         }