Update ssl.md (#1898)

pages/focus-areas/ssl.md

@@ -16,7 +16,7 @@ collaborators:
       image: ucsd.png
 ---
 
-  Together with the OSG-LHC, the Scalable Systems Laboratory (SSL) is designed to be the primary integration path to deliver the output of IRIS-HEP R&D activities into the distributed and scientific production infrastructure of the experiments.
+  Together with the OSG-LHC, the Scalable Systems Laboratory (SSL) is designed to be the primary integration path to deliver the output of IRIS-HEP R&D activities into the distributed and scientific production infrastructure of the experiments. SSL [hardware resources](https://ml.ssl-hep.org/hardware) can be [accessed through a gateway](https://ml.ssl-hep.org) for testing, training and other activities.
 
 
 ![SSL](/assets/images/ssl.png){:style="display:block; margin-left: auto; margin-right: auto; width: 75%"}