Webflow 301 redirects bulk import

webflow-301-script.js

var hostingContainer = document.getElementsByClassName('hosting-tab')[0];
var hostingController = angular.element(hostingContainer);
var scope = hostingController.scope();

var redirects = [
  {source: '/old1', target: '/new1'},
  {source: '/old2', target: '/new2'},
];

redirects.forEach(function (rule) {
  scope.redirectPath = rule.source;
  scope.redirectTarget = rule.target;
  scope.addRedirect();
});

Webflow must have changed something, these aren't working anymore. It wants path and targetPath now - but I couldn't figure out how to send those properly. Just setting them on scope.path and scope.targetPath didn't work.