diff --git a/keyboards/bastardkb/charybdis/3x5/info.json b/keyboards/bastardkb/charybdis/3x5/info.json
index cc233f35681d..03ca0cfc11bf 100644
--- a/keyboards/bastardkb/charybdis/3x5/info.json
+++ b/keyboards/bastardkb/charybdis/3x5/info.json
@@ -5,6 +5,11 @@
         "pid": "0x1832",
         "vid": "0xA8F8"
     },
+    "split": {
+        "bootmagic": {
+            "matrix": [4, 0]
+        }
+    },
     "layout_aliases": {
         "LAYOUT_charybdis_3x5": "LAYOUT"
     },
diff --git a/keyboards/bastardkb/charybdis/3x6/info.json b/keyboards/bastardkb/charybdis/3x6/info.json
index 787e3bdf14cc..e652097662ed 100644
--- a/keyboards/bastardkb/charybdis/3x6/info.json
+++ b/keyboards/bastardkb/charybdis/3x6/info.json
@@ -3,6 +3,11 @@
     "usb": {
         "pid": "0x1834"
     },
+    "split": {
+        "bootmagic": {
+            "matrix": [4, 0]
+        }
+    },
     "layout_aliases": {
         "LAYOUT_charybdis_3x6": "LAYOUT"
     },
diff --git a/keyboards/bastardkb/charybdis/4x6/info.json b/keyboards/bastardkb/charybdis/4x6/info.json
index 8259e9614108..de42974886c4 100644
--- a/keyboards/bastardkb/charybdis/4x6/info.json
+++ b/keyboards/bastardkb/charybdis/4x6/info.json
@@ -5,6 +5,11 @@
         "pid": "0x1833",
         "vid": "0xA8F8"
     },
+    "split": {
+        "bootmagic": {
+            "matrix": [5, 0]
+        }
+    },
     "layout_aliases": {
         "LAYOUT_charybdis_4x6": "LAYOUT"
     },
diff --git a/keyboards/bastardkb/scylla/info.json b/keyboards/bastardkb/scylla/info.json
index 24a0262beebe..b7c15bc9e4cc 100644
--- a/keyboards/bastardkb/scylla/info.json
+++ b/keyboards/bastardkb/scylla/info.json
@@ -7,6 +7,11 @@
         "led_count": 58,
         "split_count": [29, 29]
     },
+    "split": {
+        "bootmagic": {
+            "matrix": [5, 0]
+        }
+    },
     "layouts": {
         "LAYOUT_split_4x6_5": {
             "layout": [
diff --git a/keyboards/bastardkb/skeletyl/info.json b/keyboards/bastardkb/skeletyl/info.json
index b4bb9ea78e5c..3f1a123a629f 100644
--- a/keyboards/bastardkb/skeletyl/info.json
+++ b/keyboards/bastardkb/skeletyl/info.json
@@ -7,6 +7,11 @@
         "led_count": 36,
         "split_count": [18, 18]
     },
+    "split": {
+        "bootmagic": {
+            "matrix": [4, 0]
+        }
+    },
     "community_layouts": ["split_3x5_3"],
     "layouts": {
         "LAYOUT_split_3x5_3": {
diff --git a/keyboards/bastardkb/tbkmini/info.json b/keyboards/bastardkb/tbkmini/info.json
index ec0433d38733..cd7b5fbe4156 100644
--- a/keyboards/bastardkb/tbkmini/info.json
+++ b/keyboards/bastardkb/tbkmini/info.json
@@ -7,6 +7,11 @@
         "led_count": 42,
         "split_count": [21, 21]
     },
+    "split": {
+        "bootmagic": {
+            "matrix": [4, 0]
+        }
+    },
     "community_layouts": ["split_3x6_3"],
     "layouts": {
         "LAYOUT_split_3x6_3": {