diff --git a/kds/kds.js b/kds/kds.js
index 4abeb3d..6726317 100644
--- a/kds/kds.js
+++ b/kds/kds.js
@@ -26,31 +26,48 @@ document.addEventListener('DOMContentLoaded', () => {
 
 // Load config from localStorage
 function loadConfig() {
+  // Get business ID from portal's shared localStorage (same key portal uses)
+  const portalBusinessId = localStorage.getItem('payfrit_portal_business');
+  if (portalBusinessId && !isNaN(parseInt(portalBusinessId))) {
+    config.businessId = parseInt(portalBusinessId);
+  }
+
+  // Load KDS-specific settings
   const saved = localStorage.getItem('kds_config');
   if (saved) {
     try {
       const parsed = JSON.parse(saved);
-      config.businessId = parsed.businessId || null;
       config.servicePointId = parsed.servicePointId || null;
       config.stationId = parsed.stationId || null;
       config.stationName = parsed.stationName || null;
       config.stationColor = parsed.stationColor || null;
       config.refreshInterval = (parsed.refreshInterval || 5) * 1000;
-
-      document.getElementById('businessIdInput').value = config.businessId || '';
-      document.getElementById('servicePointIdInput').value = config.servicePointId || '';
-      document.getElementById('refreshIntervalInput').value = config.refreshInterval / 1000;
     } catch (e) {
       console.error('Failed to load config:', e);
     }
   }
 
+  document.getElementById('businessIdInput').value = config.businessId || '';
+  document.getElementById('servicePointIdInput').value = config.servicePointId || '';
+  document.getElementById('refreshIntervalInput').value = config.refreshInterval / 1000;
+
   // If no business ID, show config panel
   if (!config.businessId) {
     toggleConfig();
   }
 }
 
+function saveConfigToStorage() {
+  // Save KDS-specific settings only (businessId comes from portal)
+  localStorage.setItem('kds_config', JSON.stringify({
+    servicePointId: config.servicePointId,
+    stationId: config.stationId,
+    stationName: config.stationName,
+    stationColor: config.stationColor,
+    refreshInterval: config.refreshInterval / 1000
+  }));
+}
+
 // Check if station selection is needed
 async function checkStationSelection() {
   if (!config.businessId) return;