diff --git a/control/config_files/p10bmc/ibm,rainier-1s4u/groups.json b/control/config_files/p10bmc/ibm,rainier-1s4u/groups.json
index 67029fb..741a95a 100644
--- a/control/config_files/p10bmc/ibm,rainier-1s4u/groups.json
+++ b/control/config_files/p10bmc/ibm,rainier-1s4u/groups.json
@@ -190,6 +190,7 @@
    ]
  },
  {
+   // Repurposed as DRAM temperature sensors for 4U DDIMMs
    "name": "dram and external memory buffer temps",
    "members": [
      "/xyz/openbmc_project/sensors/temperature/dimm0_dram_extmb_temp",
@@ -211,6 +212,7 @@
    ]
  },
  {
+   // Repurposed as PMIC temperature sensors for 4U DDIMMs
    "name": "external memory buffer temps",
    "members": [
      "/xyz/openbmc_project/sensors/temperature/dimm0_extmb_temp",
diff --git a/control/config_files/p10bmc/ibm,rainier-4u/groups.json b/control/config_files/p10bmc/ibm,rainier-4u/groups.json
index 930b9bc..46b716e 100644
--- a/control/config_files/p10bmc/ibm,rainier-4u/groups.json
+++ b/control/config_files/p10bmc/ibm,rainier-4u/groups.json
@@ -340,6 +340,7 @@
    ]
  },
  {
+   // Repurposed as DRAM temperature sensors for 4U DDIMMs
    "name": "dram and external memory buffer temps",
    "members": [
      "/xyz/openbmc_project/sensors/temperature/dimm0_dram_extmb_temp",
@@ -377,6 +378,7 @@
    ]
  },
  {
+   // Repurposed as PMIC temperature sensors for 4U DDIMMs
    "name": "external memory buffer temps",
    "members": [
      "/xyz/openbmc_project/sensors/temperature/dimm0_extmb_temp",