diff --git a/configurations/system1_baseboard.json b/configurations/system1_baseboard.json
index 9156d3f..fe05abf 100644
--- a/configurations/system1_baseboard.json
+++ b/configurations/system1_baseboard.json
@@ -329,6 +329,34 @@
                 }
             ],
             "Type": "ADC"
+        },
+        {
+            "I2CAddress": 88,
+            "I2CBus": 2,
+            "Name": "Power Supply Slot 0",
+            "NamedPresenceGpio": "presence-ps0",
+            "Type": "IBMCFFPSConnector"
+        },
+        {
+            "I2CAddress": 89,
+            "I2CBus": 2,
+            "Name": "Power Supply Slot 1",
+            "NamedPresenceGpio": "presence-ps1",
+            "Type": "IBMCFFPSConnector"
+        },
+        {
+            "I2CAddress": 90,
+            "I2CBus": 2,
+            "Name": "Power Supply Slot 2",
+            "NamedPresenceGpio": "presence-ps2",
+            "Type": "IBMCFFPSConnector"
+        },
+        {
+            "I2CAddress": 91,
+            "I2CBus": 2,
+            "Name": "Power Supply Slot 3",
+            "NamedPresenceGpio": "presence-ps3",
+            "Type": "IBMCFFPSConnector"
         }
     ],
     "Name": "IBM System1 Baseboard",