diff --git a/cable_passage/cable_passage_bottom.scad b/cable_passage/cable_passage_bottom.scad
new file mode 100644
index 0000000..6e45a9d
--- /dev/null
+++ b/cable_passage/cable_passage_bottom.scad
@@ -0,0 +1,37 @@
+include <cable_passage_dimensions.scad>
+$fn=300;
+
+module cylindrical_socket(outer_r, t, h) {
+  inner_r = outer_r-2*t;
+  difference() {
+    cylinder(h=h, r=outer_r, center=true);
+    cylinder(h=h+0.01, r=outer_r-t, center=true);
+  }
+  difference() {
+    cylinder(h=h, r=inner_r, center=true);
+    cylinder(h=h+0.01, r=inner_r-t, center=true);
+  }
+}
+
+outer_r=d/2 + t;
+difference()
+{
+  // Without bore holes
+  difference() {
+    union() {
+      translate([0, 0, h_socket/2+t/2])
+      cylindrical_socket(d/2 + t, t, h_socket);
+      // Base plate
+      cylinder(h=t, r=(d+d_screw_head1+10+3*t)/2, center=true);
+    }
+    cylinder(h=h, r=d/2-2*t, center=true);
+  }
+  //for (rot=[0:1:1])
+  for (y=[-1:1:1])
+  for (x=[-1:1:1])
+  {
+    //rotate([0, 0, rot*45])
+    translate([x*(outer_r+2*t+1), y*(outer_r+2*t+1), 0])
+    cylinder(r1=d_screw_head0/2, r2=d_screw_head1/2, h=t+0.01, center=true);
+  }
+}
diff --git a/cable_passage/cable_passage_dimensions.scad b/cable_passage/cable_passage_dimensions.scad
new file mode 100644
index 0000000..fb8bb5a
--- /dev/null
+++ b/cable_passage/cable_passage_dimensions.scad
@@ -0,0 +1,8 @@
+h=50;
+h_socket=5;
+d=120;
+t=2;
+d_pg9=15.2 + 0.3;
+d_pg9_spacing=d_pg9+12;
+d_screw_head0=5;
+d_screw_head1=9;
diff --git a/cable_passage/cable_passage_top.scad b/cable_passage/cable_passage_top.scad
index 5880083..39f66a3 100644
--- a/cable_passage/cable_passage_top.scad
+++ b/cable_passage/cable_passage_top.scad
@@ -1,9 +1,5 @@
+include <cable_passage_dimensions.scad>
 $fn=50;
-h=20;
-d=100;
-t=2;
-d_pg9=15.2 + 0.3;
-d_pg9_spacing=d_pg9+10;
 
 difference() {
   // Base cylinder