config.connectorPath = '/path/to/custom/server/connector.php';
<script type="text/javascript"> ClassicEditor .create( document.querySelector( '#editor' ), { ckfinder: { uploadUrl: '/ckfinder/core/connector/php/connector.php?command=QuickUpload&type=Files&responseType=json' }, toolbar: [ 'ckfinder', 'imageUpload', '|', 'heading', '|', 'bold', 'italic', '|', 'undo', 'redo' ] } ) .catch( function( error ) { console.error( error ); } ); </script>
options : { connectorPath : '/admin/connector' }