diff --git a/src/main/java/gregtech/api/metatileentity/implementations/GT_MetaTileEntity_MultiBlockBase.java b/src/main/java/gregtech/api/metatileentity/implementations/GT_MetaTileEntity_MultiBlockBase.java
index a02a5568..6e163ebb 100644
--- a/src/main/java/gregtech/api/metatileentity/implementations/GT_MetaTileEntity_MultiBlockBase.java
+++ b/src/main/java/gregtech/api/metatileentity/implementations/GT_MetaTileEntity_MultiBlockBase.java
@@ -47,6 +47,7 @@ public abstract class GT_MetaTileEntity_MultiBlockBase extends MetaTileEntity {
     public ArrayList<GT_MetaTileEntity_Hatch_Muffler> mMufflerHatches = new ArrayList<GT_MetaTileEntity_Hatch_Muffler>();
     public ArrayList<GT_MetaTileEntity_Hatch_Energy> mEnergyHatches = new ArrayList<GT_MetaTileEntity_Hatch_Energy>();
     public ArrayList<GT_MetaTileEntity_Hatch_Maintenance> mMaintenanceHatches = new ArrayList<GT_MetaTileEntity_Hatch_Maintenance>();
+    public ArrayList<GT_MetaTileEntity_Hatch_DataAccess> mDataAccessHatches = new ArrayList<GT_MetaTileEntity_Hatch_DataAccess>();
 
     public GT_MetaTileEntity_MultiBlockBase(int aID, String aName, String aNameRegional) {
         super(aID, aName, aNameRegional, 2);
@@ -808,6 +809,17 @@ public abstract class GT_MetaTileEntity_MultiBlockBase extends MetaTileEntity {
         return false;
     }
 
+    public boolean addDataAccessToMachineList(IGregTechTileEntity aTileEntity, int aBaseCasingIndex) {
+        if (aTileEntity == null) return false;
+        IMetaTileEntity aMetaTileEntity = aTileEntity.getMetaTileEntity();
+        if (aMetaTileEntity == null) return false;
+        if (aMetaTileEntity instanceof GT_MetaTileEntity_Hatch_DataAccess) {
+            ((GT_MetaTileEntity_Hatch) aMetaTileEntity).mMachineBlock = (byte) aBaseCasingIndex;
+            return mDataAccessHatches.add((GT_MetaTileEntity_Hatch_DataAccess) aMetaTileEntity);
+        }
+        return false;
+    }
+
     @Override
     public String[] getInfoData() {
         return new String[]{"Progress:", (mProgresstime / 20) + "secs", (mMaxProgresstime / 20) + "secs", "Efficiency:", (mEfficiency / 100.0F) + "%", "Problems:", String.valueOf((getIdealStatus() - getRepairStatus()))};